Techniques for managing a radio transceiver chain for multiple radio access technologies

ABSTRACT

A user equipment (UE) may monitor a channel for wireless communication associated with a first radio access technology (RAT) during one or more of a first active duration or a first inactive duration. The UE may operate in a first power mode during the first inactive duration. The UE may monitor the channel for wireless communication associated with a second RAT during one or more of a second active duration or a second inactive duration. The UE may operate during the second inactive duration in one or more of the first power mode or a second power. The UE may operate according to the first mode or the second mode based on the monitoring of the channel associated with the first RAT and the second RAT.

CROSS REFERENCE

The present Application for Patent claims the benefit of U.S.Provisional Patent Application No. 63/025,273 by SHAHIDI et al.,entitled “SHARING RADIO TRANSCEIVER CHAIN BETWEEN DISTINCT RADIOCOMMUNICATION TECHNOLOGIES,” filed May 15, 2020, and U.S. ProvisionalPatent Application No. 63/025,528 by SHAHIDI et al., entitled “SHARINGRADIO TRANSCEIVER CHAIN BETWEEN DISTINCT RADIO COMMUNICATIONTECHNOLOGIES,” filed May 15, 2020, assigned to the assignee hereof, andhereby incorporated by reference in its entirety.

FIELD OF DISCLOSURE

The present disclosure, for example, relates to wireless communicationsystems, more particularly to techniques for managing a radiotransceiver chain for multiple radio access technologies (RATs).

BACKGROUND

Wireless communications systems are widely deployed to provide varioustypes of communication content such as voice, video, packet data,messaging, broadcast, and so on. These systems may be capable ofsupporting communication with multiple users by sharing the availablesystem resources (e.g., time, frequency, and power). Examples of suchmultiple-access systems include fourth generation (4G) systems such asLong Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, orLTE-A Pro systems, and fifth generation (5G) systems which may bereferred to as New Radio (NR) systems. These systems may employtechnologies such as code division multiple access (CDMA), time divisionmultiple access (TDMA), frequency division multiple access (FDMA),orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonalfrequency division multiplexing (DFT-S-OFDM). A wireless multiple-accesscommunications system may include one or more base stations or one ormore network access nodes, each simultaneously supporting communicationfor multiple communication devices, which may be otherwise known as userequipment (UE).

SUMMARY

The present disclosure relates to techniques for managing one or moreradio transceiver chains for multiple radio access technologies (RATs).The described techniques each have several innovative aspects, no singleone of which is solely responsible for the desirable attributesdisclosed herein.

A method for wireless communication at a device is described. The methodmay include monitoring a channel for wireless communication associatedwith a first RAT during one or more of a first active duration or afirst inactive duration, the device operating in a first power modeduring the first inactive duration, monitoring the channel for wirelesscommunication associated with a second RAT during one or more of asecond active duration or a second inactive duration, the deviceoperating during the second inactive duration in one or more of thefirst power mode based on an absence of an overlap between the firstactive duration and one or more of the second active duration or a thirdactive duration, or a second power mode based on the overlap between thefirst active duration and one or more of the second active duration orthe third active duration, and operating the device according to thefirst power mode or the second power mode based on the monitoring of thechannel associated with the first RAT and the second RAT.

An apparatus for wireless communication at a device is described. Theapparatus may include a processor, memory coupled with the processor,and instructions stored in the memory. The instructions may beexecutable by the processor to cause the apparatus to monitor a channelfor wireless communication associated with a first RAT during one ormore of a first active duration or a first inactive duration, the deviceoperating in a first power mode during the first inactive duration,monitor the channel for wireless communication associated with a secondRAT during one or more of a second active duration or a second inactiveduration, the device operating during the second inactive duration inone or more of the first power mode based on an absence of an overlapbetween the first active duration and one or more of the second activeduration or a third active duration, or a second power mode based on theoverlap between the first active duration and one or more of the secondactive duration or the third active duration, and operate the deviceaccording to the first power mode or the second power mode based on themonitoring of the channel associated with the first RAT and the secondRAT.

Another apparatus for wireless communication at a device is described.The apparatus may include means for monitoring a channel for wirelesscommunication associated with a first RAT during one or more of a firstactive duration or a first inactive duration, the device operating in afirst power mode during the first inactive duration, means formonitoring the channel for wireless communication associated with asecond RAT during one or more of a second active duration or a secondinactive duration, the device operating during the second inactiveduration in one or more of the first power mode based on an absence ofan overlap between the first active duration and one or more of thesecond active duration or a third active duration, or a second powermode based on the overlap between the first active duration and one ormore of the second active duration or the third active duration, andmeans for operating the device according to the first power mode or thesecond power mode based on the monitoring of the channel associated withthe first RAT and the second RAT.

A non-transitory computer-readable medium storing code for wirelesscommunication at a device is described. The code may includeinstructions executable by a processor to monitor a channel for wirelesscommunication associated with a first RAT during one or more of a firstactive duration or a first inactive duration, the device operating in afirst power mode during the first inactive duration, monitor the channelfor wireless communication associated with a second RAT during one ormore of a second active duration or a second inactive duration, thedevice operating during the second inactive duration in one or more ofthe first power mode based on an absence of an overlap between the firstactive duration and one or more of the second active duration or a thirdactive duration, or a second power mode based on the overlap between thefirst active duration and one or more of the second active duration orthe third active duration, and operate the device according to the firstpower mode or the second power mode based on the monitoring of thechannel associated with the first RAT and the second RAT.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the device includes a radiotransceiver chain for one or more of receiving or transmitting thewireless communication associated with one or more of the first RAT orthe second RAT.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for operating the radiotransceiver chain associated with the device in the first power modeduring the first inactive duration based on the monitoring of thechannel for the wireless communication associated with the first RATduring one or more of the first active duration or the first inactiveduration. By operating the radio transceiver chain associated with thedevice in the first power mode during the first inactive duration basedon the monitoring of the channel for the wireless communicationassociated with the first RAT during one or more of the first activeduration or the first inactive duration, the device may experiencereduced power consumption.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, monitoring the channel forthe wireless communication associated with the first RAT may includeoperations, features, means, or instructions for enabling the radiotransceiver chain to monitor the channel for the wireless communicationassociated with the first RAT during the first active duration based ona timer, activating the timer based on the enabling of the radiotransceiver chain to monitor the channel for the wireless communicationassociated with the first RAT during the first active duration, anddisabling the radio transceiver chain from monitoring the channel forthe wireless communication associated with the first RAT by switchingthe radio transceiver chain to operate in the first power mode duringthe first inactive duration based on the timer expiring. By monitoringthe channel for the wireless communication associated with the first RATduring the first active duration based on the timer, the device mayexperience reduced latency and processing, as well as an extendedbattery life for the device.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for operating the radiotransceiver chain associated with the device in one or more of the firstpower mode or the second power mode during the second inactive durationbased on the monitoring of the channel for the wireless communicationassociated with the second RAT during one or more of the second activeduration or the second inactive duration. By operating the radiotransceiver chain associated with the device in one or more of the firstpower mode or the second power mode during the second inactive duration,the device may experience reduced power consumption.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, monitoring the channel forthe wireless communication associated with the second RAT may includeoperations, features, means, or instructions for enabling the radiotransceiver chain to monitor the channel for the wireless communicationassociated with the second RAT during the second active duration basedon a timer, activating the timer based on the enabling of the radiotransceiver chain to monitor the channel for the wireless communicationassociated with the second RAT during the second active duration, anddisabling the radio transceiver chain from monitoring the channel forthe wireless communication associated with the second RAT by switchingthe radio transceiver chain to operate in the first power mode or thesecond power mode during the second inactive duration based on the timerexpiring. By monitoring the channel for the wireless communicationassociated with the second RAT during the second active duration basedon the timer, the device may experience reduced latency and processing,as well as an extended battery life for the device.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for switching the radiotransceiver chain to operate in the first power mode during the secondinactive duration based on the first inactive duration nonoverlappingwith one or more of an ending portion of the second active duration or abeginning portion of the third active duration following the secondactive duration. By switching the radio transceiver chain to operate inthe first power mode during the second inactive duration, the device mayexperience more efficient utilization of resources.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for switching the radiotransceiver chain to operate in the second power mode during the secondinactive duration based on the first inactive duration overlapping withone or more of an ending portion of the second active duration or abeginning portion of the third active duration following the secondactive duration. By switching the radio transceiver chain to operate inthe second power mode during the second inactive duration, the devicemay experience more efficient utilization of resources.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for receiving controlsignaling indicating a configuration for the device, the configurationindicating one or more of the first active duration, the first inactiveduration, the second active duration, the second inactive duration, orthe third active duration and where operating the radio transceiverchain in one or more of the first power mode or the second power modemay be based on the configuration. By receiving the control signaling,the device may support more efficient utilization of resources.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for adjusting the secondactive duration based on a portion of the first active durationoverlapping with a portion of the second active duration. By adjustingthe second active duration, the device may support more efficientutilization of resources.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining one or moreof a beginning of the first active duration or a beginning of the secondactive duration based on scheduling information and adjusting thebeginning of the second active duration to occur before the beginning ofthe first active duration based on determining that the portion of thefirst active duration overlaps with the portion of the second activeduration. Based on the determination, the device may support moreefficient utilization of resources.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for determining one or moreof an ending of the first active duration or an ending of the secondactive duration based on scheduling information and adjusting the endingof the second active duration to occur after the ending of the firstactive duration based on determining that the portion of the firstactive duration overlaps with the portion of the second active duration.Based on the determination, the device may support more efficientutilization of resources.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, allocating, based on aconfiguration, a first set of antennas associated with the device tomonitor the channel for the wireless communication associated with thefirst RAT during one or more of the first active duration or the firstinactive duration and allocating, based on the configuration, a secondset of antennas associated with the device to monitor the channel forthe wireless communication associated with the second RAT during one ormore of the second active duration or the second inactive duration. Byallocating different sets of antennas for different RATs, the device maysupport improved coordination between the different RATs.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first set of antennas maybe nonoverlapping with the second set of antennas.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for reallocating one ormore of the first set of antennas or the second set of antennas based onone or more of the first active duration or the second active duration.By reallocating different sets of antennas for different RATs, thedevice may support improved coordination between the different RATs.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for managing one or morememory registers associated with the device for one or more of the firstRAT and the second RAT, the one or more memory registers correspondingto a radio transceiver chain associated with the device, the one or morememory registers may be shared between the first RAT and the second RAT.By managing the one or more memory registers associated with the devicefor one or more of the first RAT and the second RAT, the device maysupport reduced processing.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, managing the one or morememory registers may include operations, features, means, orinstructions for refraining a first SIM associated with the device and asecond SIM associated with the device from jointly adjusting a state ofthe one or more memory registers, the first SIM corresponding to thefirst RAT and the second SIM corresponding to the second RAT. Byrefraining the first SIM associated with the device and the second SIMassociated with the device from jointly adjusting the state of the oneor more memory registers, the device may support reduced processing andimproved utilization of processing capability.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for refraining a first SIMassociated with the device and a second SIM associated with the devicefrom jointly adjusting an operating mode of a radio transceiver chainassociated with the device. By refraining the first SIM associated withthe device and the second SIM associated with the device from jointlyadjusting the operating mode of the radio transceiver chain, the devicemay support improved coordination between the first SIM and the secondSIM.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for adjusting an operatingmode of a radio transceiver chain associated with the device based on anacknowledgement between a first SIM associated with the device and asecond SIM associated with the device, the first SIM corresponding tothe first RAT and the second SIM corresponding to the second RAT. Byadjust the operating mode of the radio transceiver chain associated withthe device based on the acknowledgement, the device may support improvedcoordination between the first SIM and the second SIM.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for disabling a basebandcircuit and a radio frequency (RF) front-end circuit associated with thedevice while the device may be operating in the first power mode. Bydisabling the baseband circuit and the RF front-end circuit, the devicemay experience reduced power consumption.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for disabling a basebandcircuit associated with the device based on the device operating in thesecond power mode and enabling an RF front-end circuit associated withthe device based on the device operating in the second power mode. Bydisabling the baseband circuit based on the device operating in thesecond power mode, the device may experience reduced power consumption.By enabling the RF front-end circuit based on the device operating inthe second power mode may support efficient utilization of resources.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first active durationincludes a fourth generation (4G) wakeup duration and the second activeduration includes a fifth generation (5G) discontinuous reception (DRX)duration.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first RAT corresponds toa first SIM associated with the device and the second RAT corresponds toa second SIM associated with the device.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the device includes amultiple-input multiple-output radio transceiver chain enabled toperform spatial multiplexing.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, one or more of the first RATor the second RAT includes a 4G RAT or a 5G RAT.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an example of a wireless communications system thatsupports techniques for managing a radio transceiver chain for multipleradio access technologies (RATs) in accordance with various aspects ofthe present disclosure.

FIG. 2 shows a block diagram of a device that supports techniques formanaging a radio transceiver chain for multiple RATs in accordance withvarious aspects of the present disclosure.

FIGS. 3 through 7 illustrate examples of timelines that supporttechniques for managing a radio transceiver chain for multiple RATs inaccordance with various aspects of the present disclosure.

FIG. 8 shows a block diagram of a device that supports techniques formanaging a radio transceiver chain for multiple RATs in accordance withvarious aspects of the present disclosure.

FIGS. 9 and 10 show block diagrams of devices that support techniquesfor managing a radio transceiver chain for multiple RATs in accordancewith various aspects of the present disclosure.

FIG. 11 shows a block diagram of a communications manager that supportstechniques for managing a radio transceiver chain for multiple RATs inaccordance with various aspects of the present disclosure.

FIG. 12 shows a diagram of a system including a device that supportstechniques for managing a radio transceiver chain for multiple RATs inaccordance with various aspects of the present disclosure.

FIGS. 13 through 16 show flowcharts illustrating methods that supporttechniques for managing a radio transceiver chain for multiple RATs inaccordance with various aspects of the present disclosure.

DETAILED DESCRIPTION

A user equipment (UE) may be configured to support multiple subscriberidentity modules (SIMs). Each respective SIM of the multiple SIMs maysupport a respective radio access technology (RAT). Examples of RATsinclude fourth generation (4G) such as Long Term Evolution (LTE) orLTE-Advanced (LTE-A), and fifth generation (5G) which may be referred toas new radio (NR) or 5G NR. The UE may be configured with one or more ofa dedicated data service (DDS) SIM or a non-dedicated data service(NDDS) SIM. One or more of the DDS SIM or the NDDS SIM may support atleast one of the above example RATs. For example, the DDS SIM maysupport 5G while the NDDS SIM may support 4G. The DDS SIM may enable theUE to support wireless communications with network entities associatedwith a respective RAT (e.g., 5G), while the NDDS SIM may enable the UEto support wireless communications with network entities associated witha respective RAT (e.g., 4G). The UE may be configured to employoperating modes that reduce power consumption.

The UE may enter, for example, a deep sleep mode to conserve power.While in deep sleep mode, the UE may periodically wake up to check forpaging messages from network entities associated with a respective RATassociated with the DDS SIM. If the UE does not detect any pagingmessages, the UE may return to the deep sleep mode. Likewise, the UE mayperiodically wake up to check for paging messages from network entitiesassociated with a different respective RAT associated with the NDDS SIM,and may return to deep sleep mode if no paging messages are detected. Insome cases, the above periodic transitions between the differentoperating modes may result in inefficient resource utilization. Forexample, the above transitions may result in inefficient utilization ofantenna elements (e.g., antenna switches) at an RF front-end circuit ofthe UE. Each time the UE enters deep sleep mode, the UE may deactivatethe antenna elements (e.g., for power saving). As such, if the UE wakesfrom deep sleep mode, the UE may have to reconfigure the antennaelements before checking for paging messages. This reconfiguring of theantenna elements may accrue relatively high processing costs.

Various aspects of the present disclosure relate to techniques forenabling inter SIM coordination to reduce occasions in which the UEreconfigures the antenna elements, thereby reducing processing costs atthe UE. The inter SIM coordination may include entering a light sleepmode rather than a deep sleep mode. When entering the light sleep mode,the UE may refrain from deactivating the antenna elements. As a result,the UE may check for paging messages after waking from the light sleepmode without having to reconfigure the antenna elements. The UE maydetermine to enter the light sleep mode based on identifying an overlapin a time domain between a connected discontinuous reception mode (CDRX)period associated with a respective RAT and a page wake periodassociated with a different respective RAT. Additionally oralternatively, the UE may determine to adjust the CDRX period associatedwith the respective RAT based on identifying the overlap in the timedomain. In some other examples, the inter SIM coordination may includeactivating (e.g., waking) the DDS SIM if the UE intends to use the NDDSSIM to check for paging messages from a respective RAT. In some otherexamples, the inter SIM coordination may include allocating a firstsubset of the antenna elements to the DDS SIM and a second subset of theantenna elements to the NDDS SIM.

Aspects of the disclosure are initially described in the context ofwireless communications systems. Aspects of the disclosure are furtherillustrated by and described with reference to apparatus diagrams,system diagrams, and flowcharts that relate to techniques for managing aradio transceiver chain for multiple RATs.

FIG. 1 illustrates an example of a wireless communications system 100that supports techniques for managing a radio transceiver chain formultiple RATs in accordance with various aspects of the presentdisclosure. The wireless communications system 100 may include one ormore base stations 105, one or more UEs 115, and a core network 130. Insome examples, the wireless communications system 100 may be an LTEnetwork, an LTE-A network, an LTE-A Pro network, or a NR network. Insome examples, the wireless communications system 100 may supportenhanced broadband communications, ultra-reliable (e.g., missioncritical) communications, low latency communications, communicationswith low-cost and low-complexity devices, or any combination thereof.

The base stations 105 may be dispersed throughout a geographic area toform the wireless communications system 100 and may be devices indifferent forms or having different capabilities. The base stations 105and the UEs 115 may wirelessly communicate via one or more communicationlinks 125. Each base station 105 may provide a coverage area 110 overwhich the UEs 115 and the base station 105 may establish one or morecommunication links 125. The coverage area 110 may be an example of ageographic area over which a base station 105 and a UE 115 may supportthe communication of signals according to one or more radio accesstechnologies.

The UEs 115 may be dispersed throughout a coverage area 110 of thewireless communications system 100, and each UE 115 may be stationary,or mobile, or both at different times. The UEs 115 may be devices indifferent forms or having different capabilities. Some example UEs 115are illustrated in FIG. 1 . The UEs 115 described herein may be able tocommunicate with various types of devices, such as other UEs 115, thebase stations 105, or network equipment (e.g., core network nodes, relaydevices, integrated access and backhaul (IAB) nodes, or other networkequipment), as shown in FIG. 1 .

The base stations 105 may communicate with the core network 130, or withone another, or both. For example, the base stations 105 may interfacewith the core network 130 through one or more backhaul links 120 (e.g.,via an S1, N2, N3, or other interface). The base stations 105 maycommunicate with one another over the backhaul links 120 (e.g., via anX2, Xn, or other interface) either directly (e.g., directly between basestations 105), or indirectly (e.g., via core network 130), or both. Insome examples, the backhaul links 120 may be or include one or morewireless links. One or more of the base stations 105 described hereinmay include or may be referred to by a person having ordinary skill inthe art as a base transceiver station, a radio base station, an accesspoint, a radio transceiver, a NodeB, an eNodeB (eNB), a next-generationNodeB or a giga-NodeB (either of which may be referred to as a gNB), aHome NodeB, a Home eNodeB, or other suitable terminology.

A UE 115 may include or may be referred to as a mobile device, awireless device, a remote device, a handheld device, or a subscriberdevice, or some other suitable terminology, where the “device” may alsobe referred to as a unit, a station, a terminal, or a client, amongother examples. A UE 115 may also include or may be referred to as apersonal electronic device such as a cellular phone, a personal digitalassistant (PDA), a tablet computer, a laptop computer, or a personalcomputer. In some examples, a UE 115 may include or be referred to as awireless local loop (WLL) station, an Internet of Things (IoT) device,an Internet of Everything (IoE) device, or a machine type communications(MTC) device, among other examples, which may be implemented in variousobjects such as appliances, or vehicles, meters, among other examples.The UEs 115 described herein may be able to communicate with varioustypes of devices, such as other UEs 115 that may sometimes act as relaysas well as the base stations 105 and the network equipment includingmacro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations,among other examples, as shown in FIG. 1 .

The UEs 115 and the base stations 105 may wirelessly communicate withone another via one or more communication links 125 over one or morecarriers. The term “carrier” may refer to a set of radio frequencyspectrum band resources having a defined physical layer structure forsupporting the communication links 125. For example, a carrier used fora communication link 125 may include a portion of a radio frequencyspectrum band (e.g., a bandwidth part (BWP)) that is operated accordingto one or more physical layer channels for a given RAT (e.g., LTE,LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisitionsignaling (e.g., synchronization signals, system information), controlsignaling that coordinates operation for the carrier, user data, orother signaling. The wireless communications system 100 may supportcommunication with a UE 115 using carrier aggregation or multi-carrieroperation. A UE 115 may be configured with multiple downlink componentcarriers and one or more uplink component carriers according to acarrier aggregation configuration. Carrier aggregation may be used withboth frequency division duplexing (FDD) and time division duplexing(TDD) component carriers.

In some examples (e.g., in a carrier aggregation configuration), acarrier may also have acquisition signaling or control signaling thatcoordinates operations for other carriers. A carrier may be associatedwith a frequency channel (e.g., an evolved universal mobiletelecommunication system terrestrial radio access (E-UTRA) absoluteradio frequency channel number (EARFCN)) and may be positioned accordingto a channel raster for discovery by the UEs 115. A carrier may beoperated in a standalone mode where initial acquisition and connectionmay be conducted by the UEs 115 via the carrier, or the carrier may beoperated in a non-standalone mode where a connection is anchored using adifferent carrier (e.g., of the same or a different RAT).

The communication links 125 shown in the wireless communications system100 may include uplink transmissions from a UE 115 to a base station105, or downlink transmissions from a base station 105 to a UE 115.Carriers may carry downlink or uplink communications (e.g., in an FDDmode) or may be configured to carry downlink and uplink communications(e.g., in a TDD mode).

A carrier may be associated with a bandwidth of the radio frequencyspectrum band, and in some examples the carrier bandwidth may bereferred to as a “system bandwidth” of the carrier or the wirelesscommunications system 100. For example, the carrier bandwidth may be oneof a number of determined bandwidths for carriers of a RAT (e.g., 1.4,3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). Devices of the wirelesscommunications system 100 (e.g., the base stations 105, the UEs 115, orboth) may have hardware configurations that support communications overa carrier bandwidth or may be configurable to support communicationsover one of a set of carrier bandwidths. In some examples, the wirelesscommunications system 100 may include base stations 105 or UEs 115 thatsupport simultaneous communications via carriers associated withmultiple carrier bandwidths. In some examples, each served UE 115 may beconfigured for operating over portions (e.g., a sub-band, a BWP) or allof a carrier bandwidth.

Signal waveforms transmitted over a carrier may be made up of multiplesubcarriers (e.g., using multi-carrier modulation (MCM) techniques suchas orthogonal frequency division multiplexing (OFDM) or discrete Fouriertransform spread OFDM (DFT-S-OFDM)). In a system employing MCMtechniques, a resource element may include one symbol period (e.g., aduration of one modulation symbol) and one subcarrier, where the symbolperiod and subcarrier spacing are inversely related. The number of bitscarried by each resource element may depend on the modulation scheme(e.g., the order of the modulation scheme, the coding rate of themodulation scheme, or both). Thus, the more resource elements that a UE115 receives and the higher the order of the modulation scheme, thehigher the data rate may be for the UE 115. A wireless communicationsresource may refer to a combination of a radio frequency spectrum bandresource, a time resource, and a spatial resource (e.g., spatial layersor beams), and the use of multiple spatial layers may further increasethe data rate or data integrity for communications with a UE 115.

One or more numerologies for a carrier may be supported, where anumerology may include a subcarrier spacing (Δƒ) and a cyclic prefix. Acarrier may be divided into one or more BWPs having the same ordifferent numerologies. In some examples, a UE 115 may be configuredwith multiple BWPs. In some examples, a single BWP for a carrier may beactive at a given time and communications for the UE 115 may berestricted to one or more active BWPs.

The time intervals for the base stations 105 or the UEs 115 may beexpressed in multiples of a basic time unit which may, for example,refer to a sampling period of T_(S)=1/(Δƒ_(max)·N_(ƒ)) seconds, whereΔƒ_(max) may represent the maximum supported subcarrier spacing, andN_(ƒ) may represent the maximum supported discrete Fourier transform(DFT) size. Time intervals of a communications resource may be organizedaccording to radio frames each having a specified duration (e.g., 10milliseconds (ms)). Each radio frame may be identified by a system framenumber (SFN) (e.g., ranging from 0 to 1023).

Each frame may include multiple consecutively numbered subframes orslots, and each subframe or slot may have the same duration. In someexamples, a frame may be divided (e.g., in the time domain) intosubframes, and each subframe may be further divided into a number ofslots. Alternatively, each frame may include a variable number of slots,and the number of slots may depend on subcarrier spacing. Each slot mayinclude a number of symbol periods (e.g., depending on the length of thecyclic prefix prepended to each symbol period). In some wirelesscommunications systems 100, a slot may further be divided into multiplemini-slots containing one or more symbols. Excluding the cyclic prefix,each symbol period may contain one or more (e.g., N_(ƒ)) samplingperiods. The duration of a symbol period may depend on the subcarrierspacing or frequency band of operation.

A subframe, a slot, a mini-slot, or a symbol may be the smallestscheduling unit (e.g., in the time domain) of the wirelesscommunications system 100 and may be referred to as a transmission timeinterval (TTI). In some examples, the TTI duration (e.g., the number ofsymbol periods in a TTI) may be variable. Additionally or alternatively,the smallest scheduling unit of the wireless communications system 100may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

Physical channels may be multiplexed on a carrier according to varioustechniques. A physical control channel and a physical data channel maybe multiplexed on a downlink carrier, for example, using one or more oftime division multiplexing (TDM) techniques, frequency divisionmultiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A controlregion (e.g., a control resource set (CORESET)) for a physical controlchannel may be defined by a number of symbol periods and may extendacross the system bandwidth or a subset of the system bandwidth of thecarrier. One or more control regions (e.g., CORESETs) may be configuredfor a set of the UEs 115. For example, one or more of the UEs 115 maymonitor or search control regions for control information according toone or more search space sets, and each search space set may include oneor multiple control channel candidates in one or more aggregation levelsarranged in a cascaded manner. An aggregation level for a controlchannel candidate may refer to a number of control channel resources(e.g., control channel elements (CCEs)) associated with encodedinformation for a control information format having a given payloadsize. Search space sets may include common search space sets configuredfor sending control information to multiple UEs 115 and UE-specificsearch space sets for sending control information to a specific UE 115.

Each base station 105 may provide communication coverage via one or morecells, for example a macro cell, a small cell, a hot spot, or othertypes of cells, or any combination thereof. The term “cell” may refer toa logical communication entity used for communication with a basestation 105 (e.g., over a carrier) and may be associated with anidentifier for distinguishing neighboring cells (e.g., a physical cellidentifier (PCID), a virtual cell identifier (VCID), or others). In someexamples, a cell may also refer to a geographic coverage area 110 or aportion of a geographic coverage area 110 (e.g., a sector) over whichthe logical communication entity operates. Such cells may range fromsmaller areas (e.g., a structure, a subset of structure) to larger areasdepending on various factors such as the capabilities of the basestation 105. For example, a cell may be or include a building, a subsetof a building, or exterior spaces between or overlapping with geographiccoverage areas 110, among other examples.

A macro cell covers a relatively large geographic area (e.g., severalkilometers in radius) and may allow unrestricted access by the UEs 115with service subscriptions with the network provider supporting themacro cell. A small cell may be associated with a lower-powered basestation 105, as compared with a macro cell, and a small cell may operatein the same or different (e.g., licensed, unlicensed) radio frequencyspectrum bands as macro cells. Small cells may provide unrestrictedaccess to the UEs 115 with service subscriptions with the networkprovider or may provide restricted access to the UEs 115 having anassociation with the small cell (e.g., the UEs 115 in a closedsubscriber group (CSG), the UEs 115 associated with users in a home oroffice). A base station 105 may support one or multiple cells and mayalso support communications over the one or more cells using one ormultiple component carriers. In some examples, a carrier may supportmultiple cells, and different cells may be configured according todifferent protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhancedmobile broadband (eMBB)) that may provide access for different types ofdevices.

A base station 105 may be movable and therefore provide communicationcoverage for a moving geographic coverage area 110. In some examples,different geographic coverage areas 110 associated with differenttechnologies may overlap, but the different geographic coverage areas110 may be supported by the same base station 105. In other examples,the overlapping geographic coverage areas 110 associated with differenttechnologies may be supported by different base stations 105. Thewireless communications system 100 may include, for example, aheterogeneous network in which different types of the base stations 105provide coverage for various geographic coverage areas 110 using thesame or different radio access technologies.

The wireless communications system 100 may support synchronous orasynchronous operation. For synchronous operation, the base stations 105may have similar frame timings, and transmissions from different basestations 105 may be approximately aligned in time. For asynchronousoperation, the base stations 105 may have different frame timings, andtransmissions from different base stations 105 may, in some examples,not be aligned in time. The techniques described herein may be used foreither synchronous or asynchronous operations.

Some UEs 115, such as MTC or IoT devices, may be low cost or lowcomplexity devices and may provide for automated communication betweenmachines (e.g., via Machine-to-Machine (M2M) communication). M2Mcommunication or MTC may refer to data communication technologies thatallow devices to communicate with one another or a base station 105without human intervention. In some examples, M2M communication or MTCmay include communications from devices that integrate sensors or metersto measure or capture information and relay such information to acentral server or application program that makes use of the informationor presents the information to humans interacting with the applicationprogram. Some UEs 115 may be designed to collect information or enableautomated behavior of machines or other devices. Examples ofapplications for MTC devices include smart metering, inventorymonitoring, water level monitoring, equipment monitoring, healthcaremonitoring, wildlife monitoring, weather and geological eventmonitoring, fleet management and tracking, remote security sensing,physical access control, and transaction-based business charging.

Some UEs 115 may be configured to employ operating modes that reducepower consumption, such as half-duplex communications (e.g., a mode thatsupports one-way communication via transmission or reception, but nottransmission and reception simultaneously). In some examples,half-duplex communications may be performed at a reduced peak rate.Other power conservation techniques for the UEs 115 include entering apower saving deep sleep mode when not engaging in active communications,operating over a limited bandwidth (e.g., according to narrowbandcommunications), or a combination of these techniques. For example, someUEs 115 may be configured for operation using a narrowband protocol typethat is associated with a defined portion or range (e.g., set ofsubcarriers or resource blocks (RBs)) within a carrier, within aguard-band of a carrier, or outside of a carrier.

The wireless communications system 100 may be configured to supportultra-reliable communications or low-latency communications, or variouscombinations thereof. For example, the wireless communications system100 may be configured to support ultra-reliable low-latencycommunications (URLLC) or mission critical communications. The UEs 115may be designed to support ultra-reliable, low-latency, or criticalfunctions (e.g., mission critical functions). Ultra-reliablecommunications may include private communication or group communicationand may be supported by one or more mission critical services such asmission critical push-to-talk (MCPTT), mission critical video (MCVideo),or mission critical data (MCData). Support for mission criticalfunctions may include prioritization of services, and mission criticalservices may be used for public safety or general commercialapplications. The terms ultra-reliable, low-latency, mission critical,and ultra-reliable low-latency may be used interchangeably herein.

In some examples, a UE 115 may also be able to communicate directly withother UEs 115 over a device-to-device (D2D) communication link 135(e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115utilizing D2D communications may be within the geographic coverage area110 of a base station 105. Other UEs 115 in such a group may be outsidethe geographic coverage area 110 of a base station 105 or be otherwiseunable to receive transmissions from a base station 105. In someexamples, groups of the UEs 115 communicating via D2D communications mayutilize a one-to-many (1:M) system in which each UE 115 transmits toevery other UE 115 in the group. In some examples, a base station 105facilitates the scheduling of resources for D2D communications. In othercases, D2D communications are carried out between the UEs 115 withoutthe involvement of a base station 105.

The D2D communication link 135 may be an example of a communicationchannel, such as a sidelink communication channel, between vehicles(e.g., UEs 115). In some examples, vehicles may communicate usingvehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V)communications, or some combination of these. A vehicle may signalinformation related to traffic conditions, signal scheduling, weather,safety, emergencies, or any other information relevant to a V2X system.In some examples, vehicles in a V2X system may communicate with roadsideinfrastructure, such as roadside units, or with the network via one ormore network nodes (e.g., base stations 105) using vehicle-to-network(V2N) communications, or with both.

The core network 130 may provide user authentication, accessauthorization, tracking, Internet Protocol (IP) connectivity, and otheraccess, routing, or mobility functions. The core network 130 may be anevolved packet core (EPC) or 5G core (5GC), which may include at leastone control plane entity that manages access and mobility (e.g., amobility management entity (MME), an access and mobility managementfunction (AMF)) and at least one user plane entity that routes packetsor interconnects to external networks (e.g., a serving gateway (S-GW), aPacket Data Network (PDN) gateway (P-GW), or a user plane function(UPF)). The control plane entity may manage non-access stratum (NAS)functions such as mobility, authentication, and bearer management forthe UEs 115 served by the base stations 105 associated with the corenetwork 130. User IP packets may be transferred through the user planeentity, which may provide IP address allocation as well as otherfunctions. The user plane entity may be connected to IP services 150 forone or more network operators. The IP services 150 may include access tothe Internet, Intranet(s), an IP Multimedia Subsystem (IMS), or aPacket-Switched Streaming Service.

Some of the network devices, such as a base station 105, may includesubcomponents such as an access network entity 140, which may be anexample of an access node controller (ANC). Each access network entity140 may communicate with the UEs 115 through one or more other accessnetwork transmission entities 145, which may be referred to as radioheads, smart radio heads, or transmission/reception points (TRPs). Eachaccess network transmission entity 145 may include one or more antennapanels. In some configurations, various functions of each access networkentity 140 or base station 105 may be distributed across various networkdevices (e.g., radio heads and ANCs) or consolidated into a singlenetwork device (e.g., a base station 105).

The wireless communications system 100 may operate using one or moreradio frequency spectrum bands in the range of 300 megahertz (MHz) to300 gigahertz (GHz). The region from 300 MHz to 3 GHz is known as theultra-high frequency (UHF) region or decimeter band because thewavelengths range from approximately one decimeter to one meter inlength. The UHF waves may be blocked or redirected by buildings andenvironmental features, but the waves may penetrate structuressufficiently for a macro cell to provide service to the UEs 115 locatedindoors. The transmission of UHF waves may be associated with smallerantennas and shorter ranges (e.g., less than 100 kilometers) compared totransmission using the smaller frequencies and longer waves of the highfrequency (HF) or very high frequency (VHF) portion of the spectrumbelow 300 MHz.

The wireless communications system 100 may also operate in a super highfrequency (SHF) region using radio frequency spectrum bands from 3 GHzto 30 GHz, also known as the centimeter band, or in an extremely highfrequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz),also known as the millimeter band. In some examples, the wirelesscommunications system 100 may support millimeter wave (mmW)communications between the UEs 115 and the base stations 105, and EHFantennas of the respective devices may be smaller and more closelyspaced than UHF antennas. In some examples, this may facilitate use ofantenna arrays within a device. The propagation of EHF transmissions,however, may be subject to even greater atmospheric attenuation andshorter range than SHF or UHF transmissions. The techniques disclosedherein may be employed across transmissions that use one or moredifferent frequency regions, and designated use of radio frequencyspectrum bands across these frequency regions may differ by country orregulating body.

The wireless communications system 100 may utilize both licensed andunlicensed radio frequency spectrum bands. For example, the wirelesscommunications system 100 may employ License Assisted Access (LAA),LTE-Unlicensed (LTE-U) RAT, or NR technology in an unlicensed band suchas the 5 GHz industrial, scientific, and medical (ISM) band. Whenoperating in unlicensed radio frequency spectrum bands, devices such asthe base stations 105 and the UEs 115 may employ carrier sensing forcollision detection and avoidance. In some examples, operations inunlicensed radio frequency spectrum bands may be based on a carrieraggregation configuration in conjunction with component carriersoperating in a licensed band (e.g., LAA). Operations in unlicensedspectrum may include downlink transmissions, uplink transmissions, P2Ptransmissions, or D2D transmissions, among other examples.

A base station 105 or a UE 115 may be equipped with multiple antennas,which may be used to employ techniques such as transmit diversity,receive diversity, multiple-input multiple-output (MIMO) communications,or beamforming. The antennas of a base station 105 or a UE 115 may belocated within one or more antenna arrays or antenna panels, which maysupport MIMO operations or transmit or receive beamforming. For example,one or more base station antennas or antenna arrays may be co-located atan antenna assembly, such as an antenna tower. In some examples,antennas or antenna arrays associated with a base station 105 may belocated in diverse geographic locations. A base station 105 may have anantenna array with a number of rows and columns of antenna ports thatthe base station 105 may use to support beamforming of communicationswith a UE 115. Likewise, a UE 115 may have one or more antenna arraysthat may support various MIMO or beamforming operations. Additionally oralternatively, an antenna panel may support RF beamforming for a signaltransmitted via an antenna port.

The base stations 105 or the UEs 115 may use MIMO communications toexploit multipath signal propagation and increase the spectralefficiency by transmitting or receiving multiple signals via differentspatial layers. Such techniques may be referred to as spatialmultiplexing. The multiple signals may, for example, be transmitted bythe transmitting device via different antennas or different combinationsof antennas. Likewise, the multiple signals may be received by thereceiving device via different antennas or different combinations ofantennas. Each of the multiple signals may be referred to as a separatespatial stream and may carry bits associated with the same data stream(e.g., the same codeword) or different data streams (e.g., differentcodewords). Different spatial layers may be associated with differentantenna ports used for channel measurement and reporting. MIMOtechniques include single-user MIMO (SU-MIMO), where multiple spatiallayers are transmitted to the same receiving device, and multiple-userMIMO (MU-MIMO), where multiple spatial layers are transmitted tomultiple devices.

Beamforming, which may also be referred to as spatial filtering,directional transmission, or directional reception, is a signalprocessing technique that may be used at a transmitting device or areceiving device (e.g., a base station 105, a UE 115) to shape or steeran antenna beam (e.g., a transmit beam, a receive beam) along a spatialpath between the transmitting device and the receiving device.Beamforming may be achieved by combining the signals communicated viaantenna elements of an antenna array such that some signals propagatingat orientations with respect to an antenna array experience constructiveinterference while others experience destructive interference. Theadjustment of signals communicated via the antenna elements may includea transmitting device or a receiving device applying amplitude offsets,phase offsets, or both to signals carried via the antenna elementsassociated with the device. The adjustments associated with each of theantenna elements may be defined by a beamforming weight set associatedwith an orientation (e.g., with respect to the antenna array of thetransmitting device or receiving device, or with respect to some otherorientation).

A base station 105 or a UE 115 may use beam sweeping techniques as partof beam forming operations. For example, a base station 105 may usemultiple antennas or antenna arrays (e.g., antenna panels) to conductbeamforming operations for directional communications with a UE 115.Some signals (e.g., synchronization signals, reference signals, beamselection signals, or other control signals) may be transmitted by abase station 105 multiple times in different directions. For example,the base station 105 may transmit a signal according to differentbeamforming weight sets associated with different directions oftransmission. Transmissions in different beam directions may be used toidentify (e.g., by a transmitting device, such as a base station 105, orby a receiving device, such as a UE 115) a beam direction for latertransmission or reception by the base station 105.

Some signals, such as data signals associated with a receiving device,may be transmitted by a base station 105 in a single beam direction(e.g., a direction associated with the receiving device, such as a UE115). In some examples, the beam direction associated with transmissionsalong a single beam direction may be determined based on a signal thatwas transmitted in one or more beam directions. For example, a UE 115may receive one or more of the signals transmitted by the base station105 in different directions and may report to the base station 105 anindication of the signal that the UE 115 received with a highest signalquality or an otherwise acceptable signal quality.

In some examples, transmissions by a device (e.g., by a base station 105or a UE 115) may be performed using multiple beam directions, and thedevice may use a combination of digital precoding or RF beamforming togenerate a combined beam for transmission (e.g., from a base station 105to a UE 115). The UE 115 may report feedback that indicates precodingweights for one or more beam directions, and the feedback may correspondto a configured number of beams across a system bandwidth or one or moresub-bands. The base station 105 may transmit a reference signal (e.g., acell-specific reference signal (CRS), a channel state informationreference signal (CSI-RS)), which may be precoded or unprecoded. The UE115 may provide feedback for beam selection, which may be a precodingmatrix indicator (PMI) or codebook-based feedback (e.g., a multi-paneltype codebook, a linear combination type codebook, a port selection typecodebook). Although these techniques are described with reference tosignals transmitted in one or more directions by a base station 105, aUE 115 may employ similar techniques for transmitting signals multipletimes in different directions (e.g., for identifying a beam directionfor subsequent transmission or reception by the UE 115) or fortransmitting a signal in a single direction (e.g., for transmitting datato a receiving device).

A receiving device (e.g., a UE 115) may try multiple receiveconfigurations (e.g., directional listening) when receiving varioussignals from the base station 105, such as synchronization signals,reference signals, beam selection signals, or other control signals. Forexample, a receiving device may try multiple receive directions byreceiving via different antenna subarrays, by processing receivedsignals according to different antenna subarrays, by receiving accordingto different receive beamforming weight sets (e.g., differentdirectional listening weight sets) applied to signals received atmultiple antenna elements of an antenna array, or by processing receivedsignals according to different receive beamforming weight sets appliedto signals received at multiple antenna elements of an antenna array,any of which may be referred to as “listening” according to differentreceive configurations or receive directions. In some examples, areceiving device may use a single receive configuration to receive alonga single beam direction (e.g., when receiving a data signal). The singlereceive configuration may be aligned in a beam direction determinedbased on listening according to different receive configurationdirections (e.g., a beam direction determined to have a highest signalstrength, highest signal-to-noise ratio (SNR), or otherwise acceptablesignal quality based on listening according to multiple beamdirections).

The wireless communications system 100 may be a packet-based networkthat operates according to a layered protocol stack. In the user plane,communications at the bearer or Packet Data Convergence Protocol (PDCP)layer may be IP-based. A Radio Link Control (RLC) layer may performpacket segmentation and reassembly to communicate over logical channels.A Medium Access Control (MAC) layer may perform priority handling andmultiplexing of logical channels into transport channels. The MAC layermay also use error detection techniques, error correction techniques, orboth to support retransmissions at the MAC layer to improve linkefficiency. In the control plane, the Radio Resource Control (RRC)protocol layer may provide establishment, configuration, and maintenanceof an RRC connection between a UE 115 and a base station 105 or a corenetwork 130 supporting radio bearers for user plane data. At thephysical layer, transport channels may be mapped to physical channels.

The UEs 115 and the base stations 105 may support retransmissions ofdata to increase the likelihood that data is received successfully.Hybrid automatic repeat request (HARQ) feedback is one technique forincreasing the likelihood that data is received correctly over acommunication link 125. HARQ may include a combination of errordetection (e.g., using a cyclic redundancy check (CRC)), forward errorcorrection (FEC), and retransmission (e.g., automatic repeat request(ARQ)). HARQ may improve throughput at the MAC layer in poor radioconditions (e.g., low signal-to-noise conditions). In some examples, adevice may support same-slot HARQ feedback, where the device may provideHARQ feedback in a specific slot for data received in a previous symbolin the slot. In other cases, the device may provide HARQ feedback in asubsequent slot, or according to some other time interval.

In the wireless communications system 100, a UE 115 may supportmitigating conflicts that may occur at a radio transceiver chainassociated with the UE 115 when multiple RATs concurrently orsimultaneously use the radio transceiver chain. The radio transceiverchain may be a MIMO transceiver performing multi-spatial modulation. TheUE 115 may be configured to avoid or mitigate conflicting use of theradio transceiver chain by safeguarding states of registers (alsoreferred to as memory registers) at a radio frequency (RF) front-endcircuit of the UE 115, so that one RAT (e.g., third generation (3G), 4G,5G, among other RATs). does not overwrite such registers when anotherRAT (e.g., 3G, 4G, 5G, among other RATs) is using the registers.

In some cases, the UE 115 may mitigate such conflicting use of theregisters by utilizing resources in the radio transceiver chain. Forexample, the UE 115 may remove or eliminate contention by adjusting arespective reception or sleep cycle for each respective RAT of themultiple RATs. In some other cases, the UE 115 may be configured withadditional hardware or software components to arbitrate or manage theuse of such registers. For example, an arbitrator component (e.g., adriver of the radio transceiver chain) associated with the UE 115 maymanage the use of the registers at the RF front-end chain, so that theregisters cannot be unexpectedly changed by a respective RAT of themultiple RATs using the radio transceiver chain. In other cases, the UE115 may be configured to use a rule that involves approval of eachrespective RAT of the multiple RATs to change a respective state of arespective register.

For example, a mechanism is provided that controls changing the powermode of the radio transceiver chain (e.g., baseband circuit or an RFfront-end circuit without approval from all RATs using the radiotransceiver chain. For example, a communications manager as describedherein may serve to prevent powering off the transceiver chain (orcomponent therein) unless all RATs (e.g., a SIM 122 and a SIM 124)approve the change of power mode. For example, if all RATs areconcurrently using the radio transceiver chain, the communicationsmanager require that all RATs vote or agree to change the power mode ofthe transceiver chain. In one example, the communications manager mayconfigure additional switches or registers that have to be set by eachof the RATs in order for a power mode of the transceiver chain to bechanged. In one example, the communications manager may prevent changingthe power mode of the radio transceiver chain from a power on mode to apower off or sleep mode without approval from all RATs.

In the wireless communications system 100, a base station 105 (e.g., aradio access network (RAN)) may be associated with a first RAT (e.g.,5G), while another base station 105 (e.g., another RAN) may beassociated with a second RAT (e.g., 4G). A UE 115 may be configured tosupport multiple SIMs, such as a SIM 122 and a SIM 124. The UE 115 maybe capable of performing wireless communication with one or more of thebase stations 105 concurrently using one or more of the SIM 122 and theSIM 124. That is, the UE 115 may concurrently communicate with multipledifferent base stations 105 supporting different RATs.

A UE 115 may be configured to support one or more of a reception cycle(also referred to as an active duration), a sleep cycle (also referredto as an inactive duration) associated with one or more RATs, or a powersleep cycle (also referred to as an inactive duration), such as lightsleep cycle for a radio transceiver chain associated with the UE 115 tomitigate changes to one or more registers associated with the UE 115.For example, a UE 115 may support a first RAT (e.g., 4G LTE) and asecond RAT (e.g., 5G NR). The first RAT may be associated with a firstreception cycle (e.g., a first active duration) and a first sleep cycle(e.g., a first inactive duration). Likewise, the second RAT may beassociated with a second reception cycle (e.g., a second activeduration) and a second sleep cycle (e.g., a second inactive duration).

In some cases, if an overlap is expected between the first receptioncycle and the second reception cycle, the radio transceiver chainassociated with the UE 115 may be switched into a partial power savingmode (e.g., a partial sleep mode) instead of a deep power saving mode(e.g., a deep sleep mode). In some other cases, the UE 115 may adjust aduration of the second reception cycle based on an expected overlapbetween the first reception cycle and the second reception cycle.However, it is to be understood that durations of the first receptioncycle and the second reception cycle may be variable. As such, theexpected overlap may be an approximation. The UE 115 may also configurethe first and second reception cycles such that the second receptioncycle begins prior to the first reception cycle and ends after the firstreception cycle. Additionally or alternatively, the UE 115 may allocatea first subset of antenna switches (e.g., at the radio transceiver chainof the UE 115) to the first RAT and may allocate a second subset ofantenna switches to the second RAT.

Various aspects of the present disclosure may enable the UE 115 tosupport multiple RATs with greater efficiency, among other benefits. Forexample, various aspects of the present disclosure may enable the SIM122 and the SIM 124 to operate the radio transceiver chain of the UE 115with relatively greater efficiency based on reducing a number of timesthat the radio transceiver chain is reprogrammed. As a result, the UE115 may use the SIM 122 and the SIM 124 to support multiple RATs withrelatively lower processing costs.

FIG. 2 shows a block diagram 200 of a device 205 that supportstechniques for managing a radio transceiver chain for multiple RATs inaccordance with various aspects of the present disclosure. The device205 may be an example of aspects of a UE 115 as described herein. Thedevice 205 may include a processor 210 coupled to a radio transceiverchain 215 and one or more of a SIM 220 and a SIM 225. The SIM 220 (e.g.,a DDS SIM) may support wireless communication according to a first RAT(for example, 5G NR). The SIM 225 (e.g., an nDDS SIM) may supportwireless communication according to a second RAT (for example, 4G LTE).

The radio transceiver chain 215 may include a baseband circuit 230coupled to an RF front-end circuit 235. The RF front-end circuit 235 mayinclude one or more of a set of registers 240 (e.g., one or moreregisters), a transmitter circuit 245, or a receiver circuit 250. One ormore components of the RF front-end circuit 235 may be coupled to one ormore antennas 255. In some examples, the radio transceiver chain 215 maybe a MIMO transceiver performing multi-spatial modulation (e.g., doublespatial modulation). The radio transceiver chain 215 may supportsimultaneous wireless communications in accordance with the first andsecond RATs.

The device 205 may include a wakeup manager 260 configured to providescheduling information, including radio transceiver chain resources, forthe first and second RATs supported by the device 205. For example, thewakeup manager 260 may track when the first and second RATs are expectedor scheduled to wake up for a reception cycle (e.g., an LTE page wake oran NR C-DRX). The wakeup manager 260 may be configured to wake (e.g.,power on) the radio transceiver chain 215 based at least in part on oneor more periodic occasions or aperiodic occasions.

The set of registers 240 associated with the RF front-end circuit 235may be configured to track a respective state of the RF front-endcircuit 235. In some examples, both the SIM 220 and the SIM 225 may usethe set of registers 240. Because the set of registers 240 may be sharedbetween the SIM 220 and the SIM 225, the SIM 220 or the SIM 225 mayoverwrite one or more parameters (e.g., settings) of the other SIM(e.g., the SIM 220 or the SIM 225). The overwrite may cause a loss ofwireless communications for the RAT associated with the other SIM (e.g.,the first RAT or the second RAT), which may lead to performancedegradation or connection loss for the device 205.

In accordance with various aspects of the present disclosure, the device205 may reduce a number of times that the set of registers 240 isoverwritten based on coordinating usage of the RF front-end circuit 235between the SIM 220 and the SIM 225. For example, the device 205 mayoperate the set of registers 240 with greater efficiency based oncoordinating reception cycles and sleep cycles of the first and secondRATs. Additionally or alternatively, the device 205 may allocate a firstsubset of the antennas 255 to the SIM 220 and may allocate a secondsubset of the antennas 255 to the SIM 225. As such, the SIM 220 and theSIM 225 may use the first and second subsets of antennas 255 tocommunicate according to the first and second RATs without overwritingthe set of registers 240.

As an example, the first RAT may utilize a first quantity of receiversand switches, and the second RAT may utilize a second quantity ofreceivers and switches. The device 205 may allocate receivers andswitches from the radio transceiver chain 215 to the first RAT and thesecond RAT accordingly. For example, the device 205 may configure afirst group of receivers and switches at the radio transceiver chain 215with a setting that is compatible with one or more radio frequencyspectrum bands associated with the first RAT (e.g., NR N41). Similarly,the device 205 may configure a second group of receivers and switches atthe radio transceiver chain 215 with a setting that is compatible withone or more radio frequency spectrum bands associated with the first RAT(e.g., NR N1) or the second RAT. In some examples, the first group mayinclude a MIMO primary receiver and a MIMO diversity receiver. Likewise,the second group may include a MIMO primary receiver and a MIMOdiversity receiver.

In some examples, the device 205 may decrease the number of times thatthe set of registers 240 is overwritten based on obtaining one or moreacknowledgements from the SIM 220 or the SIM 225 prior to altering apower state of the radio transceiver chain 215. For example, the device205 may refrain from powering off the radio transceiver chain 215 (andoverwriting the set of registers 240) until the device 205 receives anacknowledgement from the SIM 220 and the SIM 225. As such, if one ormore of the SIM 220 or the SIM 225 are using the set of registers 240,the set of registers 240 may not be overwritten without acknowledgementsfrom the SIM 220 and the SIM 225. In some examples, the device 205 maydetermine whether to adjust a power level of the radio transceiver chain215 based on one or more additional switches or registers. For example,the device 205 may refrain from adjusting a power level of the radiotransceiver chain 215 or overwriting the set of registers 240 unless theone or more additional switches or registers are set to a specificstate.

Decreasing the number of times that the set of registers 240 isoverwritten may enable the device 205 to support multiple RATs withgreater efficiency and a lower processing overhead, among otherbenefits. For example, various aspects of the present disclosure mayenable the SIM 220 and the SIM 225 to operate the radio transceiverchain 215 of the device 205 with relatively greater efficiency based onreducing a number of times that the radio transceiver chain 215 ispowered on or off. As a result, the device 205 may allocate fewerprocessing resources to reconfiguring the radio transceiver chain 215and overwriting the set of registers 240. Thus, the device 205 may usethe SIM 220, the SIM 225, and the set of registers 240 to communicateaccording to the first RAT and the second RAT with a relatively higherprocessing efficiency.

FIG. 3 illustrates an example of a timeline 300 that supports techniquesfor managing a radio transceiver chain for multiple RATs in accordancewith various aspects of the present disclosure. The timeline 300 mayimplement aspects of the wireless communications system 100, or may beimplemented by aspects of the wireless communications system 100, asdescribed with reference to FIG. 1 . For example, the timeline 300 maybe based on a configuration by a base station 105, which may beimplemented by a UE 115 to provide power saving for the UE 115.Alternatively, the timeline 300 may be based on a configuration by a UE115, which may be implemented by the UE 115 to promote high reliabilityand low latency wireless communications associated with various RATs305.

In the example of FIG. 3 , a UE 115 may be configured to support one ormore of a reception cycle (also referred to as an active duration) or asleep cycle (also referred to as an inactive duration) associated withvarious RATs. The UE 115 may also be configured to support a power sleepcycle (also referred to as an inactive duration) for a radio transceiverchain associated with the UE 115. The UE 115 may use the power sleepcycle to mitigate changes to one or more registers associated with theUE 115. The UE 115 may support a first RAT 305-b (e.g., 4G LTE) and asecond RAT 305-a (e.g., 5G NR). The first RAT 305-b may be associatedwith first reception cycles 325 (e.g., first active durations) and firstsleep cycles (e.g., first inactive durations, not shown). Likewise, thesecond RAT 305-a may be associated with second reception cycles 315(e.g., second active durations) and second sleep cycles (e.g., secondinactive durations). The second sleep cycles associated with the secondRAT may include light sleep cycles 320 and deep sleep cycles 310. Insome examples, a duration 335 between the first reception cycles 325 maybe equal to a first value (e.g., 640 ms) and a duration 330 between thesecond reception cycles 315 may be equal to a second value (e.g., 160ms). For example, the UE 115 may active one or more timers, which mayenable the UE 115 to monitor wireless communication associated with oneor more of the first RAT 305-b (e.g., 4G LTE) or the second RAT 305-a(e.g., 5G NR). The one or more timers may be indicative of the duration335 between the first reception cycles 325 (e.g., 640 ms)), or theduration 330 between the second reception cycles 315 (e.g., second value(e.g., 160 ms)).

The UE 115 may receive, from a base station 105, a semi-staticconfiguration (e.g., via an RRC configuration message) indicating one ormore of the first reception cycles, the first sleep cycles, the secondreception cycles, or the second sleep cycles. For example, one or moreRRC information elements (IEs) may indicate one or more of the firstreception cycles, the first sleep cycles, the second reception cycles,or the second sleep cycles for each respective RAT. Additionally oralternatively, the UE 115 may receive, from a base station 105, adynamic configuration (e.g., a DCI or a medium access control-controlelement (MAC-CE)) indicating one or more of the first reception cycles,the first sleep cycles, the second reception cycles, or the second sleepcycles. For example, one or more IEs of a DCI or a MAC-CE may indicateone or more RRC information elements (IEs) may indicate one or more ofthe first reception cycles, the first sleep cycles, the second receptioncycles, or the second sleep cycles for each respective RAT.

A UE 115 may determine a presence or an absence of an overlap betweenone or more of a reception cycle or a sleep cycle based at least in parton one or more of the semi-static configuration or a dynamicconfiguration. In some cases, if an overlap is expected between a firstreception cycle 325-a and a leading edge of a second reception cycle315-b, the radio transceiver chain associated with the UE 115 may switchinto a light sleep cycle 320-a (e.g., a partial sleep mode) instead of adeep sleep cycle 310. Likewise, if an overlap is expected between afirst reception cycle 325-b and a leading edge of a second receptioncycle 315-e, the radio transceiver chain associated with the UE 115 mayswitch into a light sleep cycle 320-b rather than a deep sleep cycle310. In some other cases, if no overlap is expected between the firstreception cycles 325 and the second reception cycles 315, the radiotransceiver chain associated with the UE 115 may switch into deep sleepcycles 310. For example, the radio transceiver chain associated with theUE 115 may enter a deep sleep cycle 310-a if there is no expectedoverlap between the first reception cycle 325-a and the second receptioncycle 315-a. Similarly, the radio transceiver chain associated with theUE 115 may enter a deep sleep cycle 310-b and a deep sleep cycle 310-cif the first reception cycles 325 are not expected to overlap with thesecond reception cycle 315-c or the second reception cycle 315-d,respectively.

In some examples, the UE 115 may detect an overlap between the firstreception cycle 325-a and the second reception cycle 315-b based atleast in part on determining that a leading edge (e.g., a beginningportion) of the second reception cycle 315-b (e.g., an NR C-DRX activeduration) falls inside the first reception cycle 325-a (e.g., an LTEpage wakeup duration), as shown in the example of FIG. 3 . In some otherexamples, the UE 115 may detect an overlap between a first receptioncycle 325 and a second reception cycles 315 based on determining that atrailing edge (e.g., an ending portion) of the second reception cycle315 falls inside the first reception cycle 325, as described withreference to FIG. 4 . In other examples, the UE 115 may detect anoverlap between a first reception cycle 325 and a second reception cycle315 based on determining that both a leading edge and a trailing edge ofa second reception cycle 315 fall inside a first reception cycle 325, asdescribed with reference to FIG. 5 .

The timeline 300 may illustrate an example of a leading edge overlapdetection between some of the first reception cycles 325 and some of thesecond reception cycles 315. In some examples, a wakeup manager at theUE 115 may determine that a leading edge of the second reception cycle315-b overlaps with the first reception cycle 325-a. In such examples,the wakeup manager may configure a radio transceiver chain of the UE 115to enter the light sleep cycle 320-a prior to the second reception cycle315-b. While in the light sleep cycle 320-a, a first part (e.g., abaseband processing circuit) of the radio transceiver chain may beinactive and a second part (e.g., an RF front-end circuit) of the radiotransceiver chain may be active. That is, the wakeup manager may notdisable RF-front end circuit switches based on entering the light sleepcycle 320-a. As such, the wakeup manager may not re-program RF front-endcircuit switches after exiting the light sleep cycle 320-a.

In other examples, if there is no expected overlap between the firstreception cycles 325 and the second reception cycles 315, the wakeupmanager may configure the radio transceiver chain of the UE 115 to entera deep sleep cycle 310. For example, the wakeup manager may determinethat the second reception cycle 315-c does not overlap with the firstreception cycle 325-a or the first reception cycle 325-b and mayconfigure the radio transceiver chain of the UE 115 to enter the deepsleep cycle 310-b prior to the second reception cycle 315-c. While inthe deep sleep cycle 310-b, both the baseband processing circuit and theRF front-end circuit of the UE 115 may be inactive. That is, the wakeupmanager may disable the RF front-end circuit (and one or more switchesat the RF front-end circuit) based on entering the deep sleep cycle310-b. As such, the wakeup manager may re-program the RF front-endcircuit when exiting the deep sleep cycle 310-b.

The switching between deep sleep cycles 310 and light sleep cycles 320may enable the UE 115 to perform page decoding operations, search andmeasurement operations, system information block (SIB) readingoperations, scanning operations, or a combination thereof with improvedefficiency and lower processing costs based on reducing a number oftimes that the RF front-end circuit is powered on and off.

FIG. 4 illustrates an example of a timeline 400 that supports techniquesfor managing a radio transceiver chain for multiple RATs in accordancewith various aspects of the present disclosure. The timeline 400 mayimplement aspects of the wireless communications system 100, or may beimplemented by aspects of the wireless communications system 100, asdescribed with reference to FIG. 1 . For example, the timeline 400 maybe based on a configuration by a base station 105, which may beimplemented by a UE 115 to provide power saving for the UE 115.Alternatively, the timeline 400 may be based on a configuration by a UE115, which may be implemented by the UE 115 to promote high reliabilityand low latency wireless communications associated with various RATs.

In the example of FIG. 4 , a UE 115 may be configured to support one ormore reception cycles (also referred to as an active durations) or sleepcycles (also referred to as inactive durations) associated with variousRATs for a radio transceiver chain associated with the UE 115. The UE115 may mitigate changes to one or more registers associated with the UE115 based on adjusting active and inactive durations of the radiotransceiver chain associated with the UE 115, as described withreference to FIG. 2 . The UE 115 may support a first RAT 405-b (e.g., 4GLTE) and a second RAT 405-a (e.g., 5G NR). The first RAT 405-b may beassociated with first reception cycles 425 (e.g., first activedurations) and first sleep cycles (e.g., first inactive durations, notshown). Likewise, the second RAT 405-a may be associated with secondreception cycles 415 (e.g., second active durations) and second sleepcycles (e.g., second inactive durations).

The second sleep cycles associated with the second RAT may include lightsleep cycles 420 and deep sleep cycles 410. In some examples, a duration435 between the first reception cycles 425 may be equal to a first value(e.g., 640 ms) and a duration 430 between the second reception cycles415 may be equal to a second value (e.g., 160 ms). In some cases, if anoverlap is expected between a first reception cycle 425-a and a secondreception cycle 415-a, the radio transceiver chain associated with theUE 115 may switch into a light sleep cycle 420-a (e.g., a partial sleepmode) instead of a deep sleep cycle 410. Likewise, if an overlap isexpected between a first reception cycle 425-b and a second receptioncycle 415-d, the radio transceiver chain associated with the UE 115 mayswitch into a light sleep cycle 420-b rather than a deep sleep cycle410.

In some other cases, if no overlap is expected between the firstreception cycles 425 and the second reception cycles 415, the radiotransceiver chain associated with the UE 115 may switch into deep sleepcycles 410. For example, the radio transceiver chain associated with theUE 115 may enter a deep sleep cycle 410-a if there is no expectedoverlap between the first reception cycle 425-a and preceding secondreception cycles (not shown). Likewise, the radio transceiver chainassociated with the UE 115 may enter a deep sleep cycle 410-b and a deepsleep cycle 410-c if the first reception cycles 425 are not expected tooverlap with the second reception cycle 415-b or the second receptioncycle 415-c, respectively.

In some examples, the UE 115 may detect an overlap between the firstreception cycles 425 and the second reception cycles 415 based at leastin part on determining that a leading edge of a second reception cycle415 (e.g., an NR C-DRX active duration) fall inside a first receptioncycle 425 (e.g., an LTE page wakeup duration), as described in FIG. 3 .In the example of FIG. 4 , the UE 115 may detect an overlap between afirst reception cycle 425 (e.g., the first reception cycle 425-a) and asecond reception cycle 415 (e.g., the second reception cycle 415-a)based on determining that a trailing edge of the second reception cycle415 falls inside the first reception cycle 425. In other examples, theUE 115 may detect an overlap between a first reception cycle 425 and asecond reception cycle 415 based on determining that both a leading edgeand a trailing edge of the second reception cycle 415 fall inside thefirst reception cycle 425, as described with reference to FIG. 5 .

The timeline 400 may illustrate an example of a trailing edge overlapdetection between some of the first reception cycles 425 and some of thesecond reception cycles 415. As an example, a wakeup manager at the UE115 may determine that a trailing edge of the second reception cycle415-a overlaps with the first reception cycle 425-a. In such examples,the wakeup manager may configure a radio transceiver chain of the UE 115to enter the light sleep cycle 420-a after the second reception cycle415-a. While in the light sleep cycle 420-a, a first part (e.g., abaseband processing circuit) of the radio transceiver chain may beinactive and a second part (e.g., an RF front-end circuit) of the radiotransceiver chain may be active. Keeping part of the radio transceiverchain active during light sleep cycles 420 may reduce a number of timesthat registers of the radio transceiver chain are overwritten. As aresult, the UE 115 may allocate relatively fewer processing resources toconfiguring the registers.

In other examples, if there is no expected overlap between the firstreception cycles 425 and a second reception cycle 415 (e.g., a secondreception cycle 415-e), the wakeup manager may configure the radiotransceiver chain of the UE 115 to enter a deep sleep cycle 410. Forexample, the wakeup manager may determine that the second receptioncycle 415-c does not overlap with the first reception cycle 425-a or thefirst reception cycle 425-b and may configure the radio transceiverchain of the UE 115 to enter the deep sleep cycle 410-c after the secondreception cycle 415-c. While in the deep sleep cycle 410-c, both thebaseband processing circuit and the RF front-end circuit of the UE 115may be inactive. Switching between deep sleep cycles 410 and light sleepcycles 420 may enable the UE 115 to perform page decoding operations(e.g., for DDS SIMs and nDDS SIMs), search and measurement operations,SIB reading operations, scanning operations, or a combination thereofwith improved efficiency and lower processing costs based on reducing anumber of times that the RF front-end circuit is powered on and off.

FIG. 5 illustrates an example of a timeline 500 that supports techniquesfor managing a radio transceiver chain for multiple RATs in accordancewith various aspects of the present disclosure. The timeline 500 mayimplement aspects of the wireless communications system 100, or may beimplemented by aspects of the wireless communications system 100, asdescribed with reference to FIG. 1 . For example, the timeline 500 maybe based on a configuration by a base station 105, which may beimplemented by a UE 115 to provide power saving for the UE 115.Alternatively, the timeline 500 may be based on a configuration by a UE115, which may be implemented by the UE 115 to promote high reliabilityand low latency wireless communications associated with various RATs.

In the example of FIG. 5 , a UE 115 may be configured to support one ormore of a reception cycle (also referred to as an active duration) or asleep cycle (also referred to as an inactive duration) associated withone or more RATs. The UE 115 may also be configured to support a powersleep cycle (also referred to as an inactive duration) for a radiotransceiver chain associated with the UE 115. The UE 115 may use thepower sleep cycle to mitigate changes to one or more registersassociated with the UE 115, as described with reference to FIG. 2 . Forexample, the UE 115 may support a first RAT 505-b (e.g., 4G LTE) and asecond RAT 505-a (e.g., 5G NR). The first RAT 505-b may be associatedwith first reception cycles 525 (e.g., first active durations) and firstsleep cycles (e.g., first inactive durations, not shown). Likewise, thesecond RAT 505-a may be associated with second reception cycles 515(e.g., second active durations) and second sleep cycles (e.g., secondinactive durations). The second sleep cycles may include deep sleepcycles 510 and light sleep cycles 520. In some examples, a duration 535between the first reception cycles 525 may be equal to a first value(e.g., 640 ms) and a duration 530 between the second reception cycles515 may be equal to a second value (e.g., 160 ms).

In some cases, if an overlap is expected between the first receptioncycles 525 and the second reception cycles 515, the radio transceiverchain associated with the UE 115 may switch into a light sleep cycle 520(e.g., a partial sleep mode) instead of a deep sleep cycle 510 (e.g., adeep sleep mode). In some examples, the UE 115 may detect an overlapbetween a first reception cycle 525 and a second reception cycle 515based at least in part on determining that a leading edge of a secondreception cycle 515 (e.g., an NR C-DRX active duration) falls inside afirst reception cycle 525 (e.g., an LTE page wakeup duration), asdescribed with reference to FIG. 3 . In some other examples, the UE 115may detect an overlap between a first reception cycle 525 and a secondreception cycle 515 based at least in part on determining that atrailing edge of a second reception cycle 515 falls inside a firstreception cycle 525, as described with reference to FIG. 4 . In theexample of FIG. 5 , the UE 115 may detect an overlap between a firstreception cycle 525 (e.g., the first reception cycle 525-a) and a secondreception cycle 515 (e.g., the second reception cycle 515-b) based atleast in part on determining that both a leading edge and a trailingedge of the second reception cycle 515 falls inside the first receptioncycle 525.

The timeline 500 may illustrate an example of a full overlap detectionbetween the first reception cycles 525 and the second reception cycles515. As an example, a wakeup manager at the UE 115 may determine thatboth a trailing edge and a leading edge of the second reception cycle515-b overlap with the first reception cycle 525-a. Likewise, the wakeupmanager may determine that both a leading edge and a trailing edge ofthe second reception cycle 515-e overlap with the first reception cycle525-b. In such examples, the wakeup manager may configure a radiotransceiver chain of the UE 115 to enter the light sleep cycle 520-aprior the second reception cycle 515-b (e.g., on the leading edge of thesecond reception cycle 515-b) and may also configure the radiotransceiver chain of the UE 115 to enter the light sleep cycle 520-bafter the second reception cycle 515-b (e.g., on the trailing edge ofthe second reception cycle 515-b). Similarly, the wakeup manager mayconfigure the radio transceiver chain of the UE 115 to enter light sleepcycles 520 (e.g., a light sleep cycle 520-c) before and after the secondreception cycle 515-e. While in the light sleep cycle 520-a and thelight sleep cycle 520-b, a first portion (e.g., a baseband processingcircuit) of the radio transceiver chain may be inactive and a secondportion (e.g., an RF front-end circuit) of the radio transceiver chainmay be active.

In other examples, if there is no expected overlap between the firstreception cycles 525 and a second reception cycle 515 (e.g., a secondreception cycle 515-c), the wakeup manager may configure the radiotransceiver chain of the UE 115 to enter a deep sleep cycle 510. Forexample, the wakeup manager may determine that a leading edge of thesecond reception cycle 515-d does not overlap with the first receptioncycle 525-a or the first reception cycle 525-b and may configure theradio transceiver chain of the UE 115 to enter the deep sleep cycle510-b prior to the second reception cycle 515-d. Similarly, the wakeupmanager may determine that a leading edge of the second reception cycle515-a does not overlap with the first reception cycles 525 and mayconfigure the UE 115 to enter a deep sleep cycle 510-a. While in thedeep sleep cycle 510-a or the deep sleep cycle 510-b, both the basebandprocessing circuit and the RF front-end circuit of the UE 115 may beinactive. Switching between deep sleep cycles 510 and light sleep cycles520 may enable the UE 115 to perform page decoding operations, searchand measurement operations, system information block (SIB) readingoperations, scanning operations, or a combination thereof with improvedefficiency and lower processing costs based on reducing a number oftimes that the RF front-end circuit is powered on and off.

FIG. 6 illustrates an example of a timeline 600 that supports techniquesfor managing a radio transceiver chain for multiple RATs in accordancewith various aspects of the present disclosure. The timeline 600 mayimplement aspects of the wireless communications system 100, or may beimplemented by aspects of the wireless communications system 100, asdescribed with reference to FIG. 1 . For example, the timeline 600 maybe based on a configuration by a base station 105, which may beimplemented by a UE 115 to provide power saving for the UE 115.Alternatively, the timeline 600 may be based on a configuration by a UE115, which may be implemented by the UE 115 to promote high reliabilityand low latency wireless communications associated with various RATs.

In the example of FIG. 6 , a UE 115 may be configured to support one ormore of a reception cycle (also referred to as an active duration) or asleep cycle (also referred to as an inactive duration) associated withone or more RATs. The UE 115 may also be configured to support a powersleep cycle (also referred to as an inactive duration) for a radiotransceiver chain associated with the UE 115. The UE 115 may use thepower sleep cycle to mitigate changes to one or more registersassociated with the UE 115, as described with reference to FIG. 2 .

The UE 115 may support a first RAT 605-b (e.g., 4G LTE) and a second RAT605-a (e.g., 5G NR). The first RAT 605-b may be associated with firstreception cycles 625 (e.g., first active durations) and first sleepcycles (e.g., first inactive durations, not shown). Likewise, the secondRAT 605-a may be associated with second reception cycles 615 (e.g.,second active durations) and deep sleep cycles 610 (e.g., secondinactive durations). In some examples, a duration 635 between the firstreception cycles 625 may be equal to a first value (e.g., 640 ms) and aduration 630 between the second reception cycles 615 may be equal to asecond value (e.g., 160 ms).

In some examples, if a first reception cycle 625-a that is associatedwith the first RAT 605-b overlaps (e.g., in the time-domain) with asecond reception cycle 615-b that is associated with the second RAT605-a, SIMs associated with the first RAT 605-b and the second RAT 605-amay overwrite one or more common (e.g., shared) registers at a radiotransceiver chain of the UE 115. For example, if a first SIM (e.g., annDDS SIM) associated with the first RAT 605-b is using one or moreshared registers to monitor for communications according to the firstRAT 605-b and a second SIM (e.g., a DDS SIM) associated with the secondRAT 605-a overwrites the shared registers, the UE 115 may experienceperformance degradation or connection loss for the first RAT 605-b.

The UE 115 may be configured to mitigate overwriting one or moreregisters of an RF front-end circuit associated with the UE 115 based onstarting a second reception cycle 615 (e.g., a second reception cycle615-b) early or extending a second reception cycle 615 (e.g., a secondreception cycle 615-d) so as to fully overlap with the first receptioncycles 625. For example, the UE 115 may append a second reception cycle615-f to a leading edge of the second reception cycle 615-b such that acombination of the second reception cycle 615-b and the second receptioncycle 615-f fully overlaps a first reception cycle 625-a. Likewise, theUE 115 may append a second reception cycle 615-g to the second receptioncycle 615-d such that a combination of the second reception cycle 615-dand the second reception cycle 615-g fully overlaps a first receptioncycle 625-b.

To extend the second reception cycles 615 such that the second receptioncycles 615 fully overlap with the first reception cycles 625, the UE 115may reduce a duration of the deep sleep cycles 610. For example, the UE115 may reduce a duration of a deep sleep cycle 610-b such that the UE115 may append the second reception cycle 615-f to a leading edge of thesecond reception cycle 615-b. Similarly, the UE 115 may reduce aduration of a deep sleep cycle 610-e such that the UE 115 may append thesecond reception cycle 615-g to a trailing edge of the second receptioncycle 615-d. In other examples, the UE 115 may not adjust some of thedeep sleep cycles 610. For example, the UE 115 may not shorten a deepsleep cycle 610-a, a deep sleep cycle 610-c, or a deep sleep cycle 610-dbecause these deep sleep cycles 610 may not overlap with the firstreception cycles 625. Likewise, the UE 115 may not extend a secondreception cycle 615-a, a second reception cycle 615-c, or a secondreception cycle 615-e because these second reception cycles 615 may notoverlap with the first reception cycles 625.

In some examples, a wakeup manager of the UE 115 may determine that thefirst reception cycle 625-a overlaps with a leading edge of the secondreception cycle 615-b and the first reception cycle 625-b overlaps witha trailing edge of the second reception cycle 615-d. Accordingly, thewakeup manager may append the second reception cycle 615-f to theleading edge of the second reception cycle 615-b and may append thesecond reception cycle 615-g to the trailing edge of the secondreception cycle 615-d. Thus, a combined duration of the second receptioncycle 615-b and the second reception cycle 615-f may fully overlap thefirst reception cycle 625-a. Likewise, a combined duration of the secondreception cycle 615-d and the second reception cycle 615-g may fullyoverlap the first reception cycle 625-b.

By fully overlapping (e.g., encapsulating) the first reception cycles625 via leading edge extension or trailing end extension of the secondreception cycles 615, the UE 115 may reduce a number of times that aradio transceiver chain at the UE 115 is powered on and off. As aresult, the UE 115 may reduce a number of times that registersassociated with the radio transceiver chain are overwritten, which mayenable the UE 115 to use the registers with relatively lower processingcosts, among other benefits.

FIG. 7 illustrates an example of a timeline 700 that supports techniquesfor managing a radio transceiver chain for multiple RATs in accordancewith various aspects of the present disclosure. The timeline 700 mayimplement aspects of the wireless communications system 100, or may beimplemented by aspects of the wireless communications system 100, asdescribed with reference to FIG. 1 . For example, the timeline 700 maybe based on a configuration by a base station 105, which may beimplemented by a UE 115 to provide power saving for the UE 115.Alternatively, the timeline 700 may be based on a configuration by a UE115, which may be implemented by the UE 115 to promote high reliabilityand low latency wireless communications associated with various RATs.

A UE 115 may be configured to support one or more of a reception cycle(also referred to as an active duration) or a sleep cycle (also referredto as an inactive duration) associated with one or more RATs 705. The UE115 may also be configured to support a power sleep cycle (also referredto as an inactive duration) for a radio transceiver chain associatedwith the UE 115. The UE 115 may use the power sleep cycle to mitigatechanges to one or more registers associated with the UE 115 as describedwith reference to FIG. 2 .

The UE 115 may support a first RAT 705-b (e.g., 4G LTE) and a second RAT705-a (e.g., 5G NR). The first RAT 705-b may be associated with firstreception cycles 725 (e.g., first active durations) and first sleepcycles (e.g., first inactive durations, not shown). Likewise, the secondRAT 705-a may be associated with second reception cycles 715 (e.g.,second active durations) and deep sleep cycles 710 (e.g., secondinactive durations). In some examples, a duration 735 between the firstreception cycles 725 may be equal to a first value (e.g., 640 ms) and aduration 730 between the second reception cycles 715 may be equal to asecond value (e.g., 160 ms).

In some cases, if an overlap is expected between a first reception cycle725 and a second reception cycle 715, the radio transceiver chainassociated with the UE 115 may switch into a partial power saving mode(e.g., a partial sleep mode) instead of a deep sleep cycle 710, asdescribed with reference to FIGS. 3 through 5 . In some examples, if thefirst reception cycles 725 associated with the first RAT 705-b overlap(e.g., in the time-domain) with the second reception cycles 715associated with the second RAT 705-a, SIMs corresponding to the firstRAT 705-b and the second RAT 705-a may overwrite one or more registersat the UE 115, which may disrupt wireless communications at the UE 115.For example, if a first SIM associated with the first RAT 705-b is usingone or more registers to monitor for communications according to thefirst RAT 705-b and a second SIM associated with the second RAT 705-aoverwrites the one or more registers, the UE 115 may experienceperformance degradation or connection loss for the first RAT 705-b.

In the example of FIG. 7 , the UE 115 may be configured to mitigateoverwriting one or more registers of an RF front-end circuit associatedwith the UE 115 based on extending both a leading edge and a trailingedge of a second reception cycle 715 (e.g., a second reception cycle715-b) so as to fully overlap with a first reception cycle 725 (e.g., afirst reception cycle 725-a). For example, the UE 115 may extend aleading edge of the second reception cycle 715-b with a second receptioncycle 715-f and may extend a trailing edge of the second reception cycle715-b with a second reception cycle 715-g. If the first reception cycle725-a is fully overlapped by a combination of the second reception cycle715-b, the second reception cycle 715-f, and the second reception cycle715-g, the likelihood of overwriting register states in the RF front-endcircuit of the UE 115 may be reduced. Similarly, the UE 115 may extendthe second reception cycle 715-e with a second reception cycle 715-h anda second reception cycle 715-i such that a combination of the secondreception cycle 715-e, the second reception cycle 715-h, and the secondreception cycle 715-i fully overlaps a first reception cycle 725-b.

To extend the second reception cycles 715 such that the second receptioncycles 715 fully overlap with the first reception cycles 725, the UE 115may reduce a duration of the deep sleep cycles 710. For example, the UE115 may reduce a duration of a deep sleep cycle 710-b and a duration ofa deep sleep cycle 710-c such that the UE 115 may append the secondreception cycle 715-f and the second reception cycle 715-g to the secondreception cycle 715-b. Similarly, the UE 115 may reduce a duration of adeep sleep cycle 710-e such that the UE 115 may append the secondreception cycle 715-h and the second reception cycle 715-i to the secondreception cycle 715-e. In other examples, the UE 115 may not adjust someof the deep sleep cycles 710. For example, the UE 115 may not shorten adeep sleep cycle 710-a or a deep sleep cycle 710-d because these deepsleep cycles 710 may not overlap with the first reception cycles 725.Likewise, the UE 115 may not extend a second reception cycle 715-a, asecond reception cycle 715-c, or a second reception cycle 715-d becausethese second reception cycles 715 may not overlap with the firstreception cycles 725.

By fully overlapping (e.g., encapsulating) the first reception cycles725 via leading edge extension or trailing end extension of the secondreception cycles 715, the UE 115 may reduce a number of times that aradio transceiver chain at the UE 115 is powered on and off. As aresult, the UE 115 may reduce a number of times that registersassociated with the radio transceiver chain are overwritten, which mayenable the UE 115 to use the registers with relatively lower processingcosts, among other benefits.

FIG. 8 shows a block diagram 800 of a device 805 that supportstechniques for managing a radio transceiver chain for multiple RATs inaccordance with various aspects of the present disclosure. The device805 may be an example of aspects of a UE 115 as described herein. Insome examples, the device 805 may be an RF front-end circuit. The device805 may include a set of registers 810 that may be associated with a setof antennas 815. Additionally or alternatively, the device 805 mayinclude a set of registers 820 that may be associated with a set ofantennas 825. The device 805 may support multiple RATs, which mayinclude 2G, 3G, 4G, 5G, 6G or any other type of RAT.

In some examples, a SIM associated with the device 805 may use datastored in the registers 810 and the registers 820 to perform wirelesscommunications while the device 805 is in a reception cycle (e.g., aconnected state). In some examples, however, the device 805 may enter adeep sleep cycle. While in the deep sleep cycle, the device 805 mayoverwrite one or more of the registers 810 or the registers 820. As aresult, data stored in the registers 810 and the registers 820 may belost. Thus, the SIM associated with the device 805 may be unable toaccess the data that was previously stored in the registers 810 and theregisters 820, which may disrupt wireless communications at the device805. To mitigate such overwrites, the device 805 may enter a light sleepcycle rather than a deep sleep cycle, as described with reference toFIGS. 3 through 5 . While in the light sleep cycle, the device 805 mayrefrain from overwriting the registers 810 or the registers 820.Additionally or alternatively, the device 805 may extend a duration ofthe reception cycle such that the registers 810 and the registers 820are not overwritten, as described with reference to FIGS. 6 and 7 .

In some examples, the set of registers 810 associated with the set ofantennas 815 may correspond to one type of RAT (e.g., 4G), while the setof registers 820 associated with a set of antennas 825 may correspond toanother type of RAT (e.g., 5G). The device 805 may support associatingone or more of the set of registers 810 or the set of registers 820 toone or more of the set of antennas 815 or the set of antennas 825. Forpaging and C-DRX reception, the device 805 may be configured to use asubset of the antennas. This pre-association of registers and subset ofantennas may enable dynamic allocation of one or more of availableregisters or set of antennas to reception cycles for different RATs,while mitigating conflicts for the RF front-end circuit.

FIG. 9 shows a block diagram 900 of a device 905 that supportstechniques for managing a radio transceiver chain for multiple RATs inaccordance with various aspects of the present disclosure. The device905 may be an example of aspects of a UE 115 as described herein. Thedevice 905 may include a receiver 910, a transmitter 915, and acommunications manager 920. The device 905 may also include a processor.Each of these components may be in communication with one another (e.g.,via one or more buses).

The receiver 910 may provide a means for receiving information such aspackets, user data, control information, or any combination thereofassociated with various information channels (e.g., control channels,data channels, information channels related to techniques for managing aradio transceiver chain for multiple RATs). Information may be passed onto other components of the device 905. The receiver 910 may utilize asingle antenna or a set of multiple antennas.

The transmitter 915 may provide a means for transmitting signalsgenerated by other components of the device 905. For example, thetransmitter 915 may transmit information such as packets, user data,control information, or any combination thereof associated with variousinformation channels (e.g., control channels, data channels, informationchannels related to techniques for managing a radio transceiver chainfor multiple RATs). In some examples, the transmitter 915 may beco-located with a receiver 910 in a transceiver component. Thetransmitter 915 may utilize a single antenna or a set of multipleantennas.

The communications manager 920, the receiver 910, the transmitter 915,or various combinations thereof or various components thereof may beexamples of means for performing various aspects of techniques formanaging a radio transceiver chain for multiple RATs as describedherein. For example, the communications manager 920, the receiver 910,the transmitter 915, or various combinations or components thereof maysupport a method for performing one or more of the functions describedherein.

In some examples, the communications manager 920, the receiver 910, thetransmitter 915, or various combinations or components thereof may beimplemented in hardware (e.g., in communications management circuitry).The hardware may include a processor, a digital signal processor (DSP),an application-specific integrated circuit (ASIC), a field-programmablegate array (FPGA) or other programmable logic device, a discrete gate ortransistor logic, discrete hardware components, or any combinationthereof configured as or otherwise supporting a means for performing thefunctions described in the present disclosure. In some examples, aprocessor and memory coupled with the processor may be configured toperform one or more of the functions described herein (e.g., byexecuting, by the processor, instructions stored in the memory).

Additionally or alternatively, in some examples, the communicationsmanager 920, the receiver 910, the transmitter 915, or variouscombinations or components thereof may be implemented in code (e.g., ascommunications management software or firmware) executed by a processor.If implemented in code executed by a processor, the functions of thecommunications manager 920, the receiver 910, the transmitter 915, orvarious combinations or components thereof may be performed by ageneral-purpose processor, a DSP, a central processing unit (CPU), anASIC, an FPGA, or any combination of these or other programmable logicdevices (e.g., configured as or otherwise supporting a means forperforming the functions described in the present disclosure).

In some examples, the communications manager 920 may be configured toperform various operations (e.g., receiving, monitoring, transmitting)using or otherwise in cooperation with the receiver 910, the transmitter915, or both. For example, the communications manager 920 may receiveinformation from the receiver 910, send information to the transmitter915, or be integrated in combination with the receiver 910, thetransmitter 915, or both to receive information, transmit information,or perform various other operations as described herein.

The communications manager 920 may support wireless communication at thedevice 905 in accordance with examples as disclosed herein. For example,the communications manager 920 may be configured as or otherwise supporta means for monitoring a channel for wireless communication associatedwith a first RAT during one or more of a first active duration or afirst inactive duration, the device 905 operating in a first power modeduring the first inactive duration. The communications manager 920 maybe configured as or otherwise support a means for monitoring the channelfor wireless communication associated with a second RAT during one ormore of a second active duration or a second inactive duration, thedevice 905 operating during the second inactive duration in one or moreof the first power mode based on an absence of an overlap between thefirst active duration and one or more of the second active duration or athird active duration, or a second power mode based on the overlapbetween the first active duration and one or more of the second activeduration or the third active duration. The communications manager 920may be configured as or otherwise support a means for operating thedevice 905 according to the first power mode or the second power modebased on the monitoring of the channel associated with the first RAT andthe second RAT.

By including or configuring the communications manager 920 in accordancewith examples as described herein, the device 905 (e.g., a processorcontrolling or otherwise coupled to the receiver 910, the transmitter915, the communications manager 920, or a combination thereof) maysupport techniques for reduced power consumption.

FIG. 10 shows a block diagram 1000 of a device 1005 that supportstechniques for managing a radio transceiver chain for multiple RATs inaccordance with various aspects of the present disclosure. The device1005 may be an example of aspects of a device 905 or a UE 115 asdescribed herein. The device 1005 may include a receiver 1010, atransmitter 1015, and a communications manager 1020. The device 1005 mayalso include a processor. Each of these components may be incommunication with one another (e.g., via one or more buses).

The receiver 1010 may provide a means for receiving information such aspackets, user data, control information, or any combination thereofassociated with various information channels (e.g., control channels,data channels, information channels related to techniques for managing aradio transceiver chain for multiple RATs). Information may be passed onto other components of the device 1005. The receiver 1010 may utilize asingle antenna or a set of multiple antennas.

The transmitter 1015 may provide a means for transmitting signalsgenerated by other components of the device 1005. For example, thetransmitter 1015 may transmit information such as packets, user data,control information, or any combination thereof associated with variousinformation channels (e.g., control channels, data channels, informationchannels related to techniques for managing a radio transceiver chainfor multiple RATs). In some examples, the transmitter 1015 may beco-located with a receiver 1010 in a transceiver component. Thetransmitter 1015 may utilize a single antenna or a set of multipleantennas.

The device 1005, or various components thereof, may be an example ofmeans for performing various aspects of techniques for managing a radiotransceiver chain for multiple RATs as described herein. For example,the communications manager 1020 may include a channel component 1025 amode component 1030, or any combination thereof. The communicationsmanager 1020 may be an example of aspects of a communications manager920 as described herein. In some examples, the communications manager1020, or various components thereof, may be configured to performvarious operations (e.g., receiving, monitoring, transmitting) using orotherwise in cooperation with the receiver 1010, the transmitter 1015,or both. For example, the communications manager 1020 may receiveinformation from the receiver 1010, send information to the transmitter1015, or be integrated in combination with the receiver 1010, thetransmitter 1015, or both to receive information, transmit information,or perform various other operations as described herein.

The communications manager 1020 may support wireless communication atthe device 1005 in accordance with examples as disclosed herein. Thechannel component 1025 may be configured as or otherwise support a meansfor monitoring a channel for wireless communication associated with afirst RAT during one or more of a first active duration or a firstinactive duration, the device 1005 operating in a first power modeduring the first inactive duration. The channel component 1025 may beconfigured as or otherwise support a means for monitoring the channelfor wireless communication associated with a second RAT during one ormore of a second active duration or a second inactive duration, thedevice 1005 operating during the second inactive duration in one or moreof the first power mode based on an absence of an overlap between thefirst active duration and one or more of the second active duration or athird active duration, or a second power mode based on the overlapbetween the first active duration and one or more of the second activeduration or the third active duration. The mode component 1030 may beconfigured as or otherwise support a means for operating the device 1005according to the first power mode or the second power mode based on themonitoring of the channel associated with the first RAT and the secondRAT.

FIG. 11 shows a block diagram 1100 of a communications manager 1120 thatsupports techniques for managing a radio transceiver chain for multipleRATs in accordance with various aspects of the present disclosure. Thecommunications manager 1120 may be an example of aspects of acommunications manager 920, a communications manager 1020, or both, asdescribed herein. The communications manager 1120, or various componentsthereof, may be an example of means for performing various aspects oftechniques for managing a radio transceiver chain for multiple RATs asdescribed herein. For example, the communications manager 1120 mayinclude a channel component 1125, a mode component 1130, a timingcomponent 1135, an RF chain component 1140, a register component 1145, aSIM component 1150, a circuit component 1155, a configuration component1160, or any combination thereof. Each of these components maycommunicate, directly or indirectly, with one another (e.g., via one ormore buses).

The communications manager 1120 may support wireless communication at adevice in accordance with examples as disclosed herein. The channelcomponent 1125 may be configured as or otherwise support a means formonitoring a channel for wireless communication associated with a firstRAT during one or more of a first active duration or a first inactiveduration, the device operating in a first power mode during the firstinactive duration. In some examples, the channel component 1125 may beconfigured as or otherwise support a means for monitoring the channelfor wireless communication associated with a second RAT during one ormore of a second active duration or a second inactive duration, thedevice operating during the second inactive duration in one or more ofthe first power mode based on an absence of an overlap between the firstactive duration and one or more of the second active duration or a thirdactive duration, or a second power mode based on the overlap between thefirst active duration and one or more of the second active duration orthe third active duration. The mode component 1130 may be configured asor otherwise support a means for operating the device according to thefirst power mode or the second power mode based on the monitoring of thechannel associated with the first RAT and the second RAT.

In some examples, the device includes a radio transceiver chain for oneor more of receiving or transmitting the wireless communicationassociated with one or more of the first RAT or the second RAT. In someexamples, the mode component 1130 may be configured as or otherwisesupport a means for operating the radio transceiver chain associatedwith the device in the first power mode during the first inactiveduration based on the monitoring of the channel for the wirelesscommunication associated with the first RAT during one or more of thefirst active duration or the first inactive duration. In some examples,to support monitoring the channel for the wireless communicationassociated with the first RAT, the RF chain component 1140 may beconfigured as or otherwise support a means for enabling the radiotransceiver chain to monitor the channel for the wireless communicationassociated with the first RAT during the first active duration based ona timer. In some examples, to support monitoring the channel for thewireless communication associated with the first RAT, the timingcomponent 1135 may be configured as or otherwise support a means foractivating the timer based on the enabling of the radio transceiverchain to monitor the channel for the wireless communication associatedwith the first RAT during the first active duration.

In some examples, to support monitoring the channel for the wirelesscommunication associated with the first RAT, the RF chain component 1140may be configured as or otherwise support a means for disabling theradio transceiver chain from monitoring the channel for the wirelesscommunication associated with the first RAT by switching the radiotransceiver chain to operate in the first power mode during the firstinactive duration based on the timer expiring. In some examples, the RFchain component 1140 may be configured as or otherwise support a meansfor operating the radio transceiver chain associated with the device inone or more of the first power mode or the second power mode during thesecond inactive duration based on the monitoring of the channel for thewireless communication associated with the second RAT during one or moreof the second active duration or the second inactive duration.

In some examples, to support monitoring the channel for the wirelesscommunication associated with the second RAT, the RF chain component1140 may be configured as or otherwise support a means for enabling theradio transceiver chain to monitor the channel for the wirelesscommunication associated with the second RAT during the second activeduration based on a timer. In some examples, to support monitoring thechannel for the wireless communication associated with the second RAT,the timing component 1135 may be configured as or otherwise support ameans for activating the timer based on the enabling of the radiotransceiver chain to monitor the channel for the wireless communicationassociated with the second RAT during the second active duration. Insome examples, to support monitoring the channel for the wirelesscommunication associated with the second RAT, the RF chain component1140 may be configured as or otherwise support a means for disabling theradio transceiver chain from monitoring the channel for the wirelesscommunication associated with the second RAT by switching the radiotransceiver chain to operate in the first power mode or the second powermode during the second inactive duration based on the timer expiring.

In some examples, the RF chain component 1140 may be configured as orotherwise support a means for switching the radio transceiver chain tooperate in the first power mode during the second inactive durationbased on the first inactive duration nonoverlapping with one or more ofan ending portion of the second active duration or a beginning portionof the third active duration following the second active duration. Insome examples, the RF chain component 1140 may be configured as orotherwise support a means for switching the radio transceiver chain tooperate in the second power mode during the second inactive durationbased on the first inactive duration overlapping with one or more of anending portion of the second active duration or a beginning portion ofthe third active duration following the second active duration.

In some examples, the configuration component 1160 may be configured asor otherwise support a means for receiving control signaling indicatinga configuration for the device, the configuration indicating one or moreof the first active duration, the first inactive duration, the secondactive duration, the second inactive duration, or the third activeduration. In some examples, the mode component 1130 may be configured asor otherwise support a means for where operating the radio transceiverchain in one or more of the first power mode or the second power mode isbased on the configuration. In some examples, the timing component 1135may be configured as or otherwise support a means for adjusting thesecond active duration based on a portion of the first active durationoverlapping with a portion of the second active duration.

In some examples, the timing component 1135 may be configured as orotherwise support a means for determining one or more of a beginning ofthe first active duration or a beginning of the second active durationbased on scheduling information. In some examples, the timing component1135 may be configured as or otherwise support a means for adjusting thebeginning of the second active duration to occur before the beginning ofthe first active duration based on determining that the portion of thefirst active duration overlaps with the portion of the second activeduration. In some examples, the timing component 1135 may be configuredas or otherwise support a means for determining one or more of an endingof the first active duration or an ending of the second active durationbased on scheduling information. In some examples, the timing component1135 may be configured as or otherwise support a means for adjusting theending of the second active duration to occur after the ending of thefirst active duration based on determining that the portion of the firstactive duration overlaps with the portion of the second active duration.

In some examples, the RF chain component 1140 may be configured as orotherwise support a means for allocating, based on a configuration, afirst set of antennas associated with the device to monitor the channelfor the wireless communication associated with the first RAT during oneor more of the first active duration or the first inactive duration. Insome examples, the RF chain component 1140 may be configured as orotherwise support a means for allocating, based on the configuration, asecond set of antennas associated with the device to monitor the channelfor the wireless communication associated with the second RAT during oneor more of the second active duration or the second inactive duration.In some examples, the first set of antennas are nonoverlapping with thesecond set of antennas. In some examples, the RF chain component 1140may be configured as or otherwise support a means for reallocating oneor more of the first set of antennas or the second set of antennas basedon one or more of the first active duration or the second activeduration.

In some examples, the register component 1145 may be configured as orotherwise support a means for managing one or more memory registersassociated with the device for one or more of the first RAT and thesecond RAT, the one or more memory registers corresponding to a radiotransceiver chain associated with the device, the one or more memoryregisters are shared between the first RAT and the second RAT. In someexamples, to support managing the one or more memory registers, the SIMcomponent 1150 may be configured as or otherwise support a means forrefraining a first SIM associated with the device and a second SIMassociated with the device from jointly adjusting a state of the one ormore memory registers, the first SIM corresponding to the first RAT andthe second SIM corresponding to the second RAT.

In some examples, the SIM component 1150 may be configured as orotherwise support a means for refraining a first SIM associated with thedevice and a second SIM associated with the device from jointlyadjusting an operating mode of a radio transceiver chain associated withthe device. In some examples, the mode component 1130 may be configuredas or otherwise support a means for adjusting an operating mode of aradio transceiver chain associated with the device based on anacknowledgement between a first SIM associated with the device and asecond SIM associated with the device, the first SIM corresponding tothe first RAT and the second SIM corresponding to the second RAT.

In some examples, the circuit component 1155 may be configured as orotherwise support a means for disabling a baseband circuit and an RFfront-end circuit associated with the device while the device isoperating in the first power mode. In some examples, the circuitcomponent 1155 may be configured as or otherwise support a means fordisabling a baseband circuit associated with the device based on thedevice operating in the second power mode. In some examples, the circuitcomponent 1155 may be configured as or otherwise support a means forenabling an RF front-end circuit associated with the device based on thedevice operating in the second power mode. In some examples, the firstactive duration includes a 4G wakeup duration and the second activeduration includes a 5G discontinuous reception duration. In someexamples, the first RAT corresponds to a first SIM associated with thedevice and the second RAT corresponds to a second SIM associated withthe device. In some examples, the device includes a MIMO radiotransceiver chain enabled to perform spatial multiplexing. In someexamples, one or more the first RAT or the second RAT includes a 4G RATor a 5G RAT, or any other type of RAT.

FIG. 12 shows a diagram of a system 1200 including a device 1205 thatsupports techniques for managing a radio transceiver chain for multipleRATs in accordance with various aspects of the present disclosure. Thedevice 1205 may be an example of or include the components of a device905, a device 1005, or a UE 115 as described herein. The device 1205 maycommunicate wirelessly with one or more base stations 105, UEs 115, orany combination thereof. The device 1205 may include components forbi-directional voice and data communications including components fortransmitting and receiving communications, such as a communicationsmanager 1220, an input/output (I/O) controller 1210, a transceiver 1215,an antenna 1225, a memory 1230, code 1235, and a processor 1240. Thesecomponents may be in electronic communication or otherwise coupled(e.g., operatively, communicatively, functionally, electronically,electrically) via one or more buses (e.g., a bus 1245).

The I/O controller 1210 may manage input and output signals for thedevice 1205. The I/O controller 1210 may also manage peripherals notintegrated into the device 1205. In some cases, the I/O controller 1210may represent a physical connection or port to an external peripheral.In some cases, the I/O controller 1210 may utilize an operating systemsuch as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, oranother known operating system. Additionally or alternatively, the I/Ocontroller 1210 may represent or interact with a modem, a keyboard, amouse, a touchscreen, or a similar device. In some cases, the I/Ocontroller 1210 may be implemented as part of a processor, such as theprocessor 1240. In some cases, a user may interact with the device 1205via the I/O controller 1210 or via hardware components controlled by theI/O controller 1210.

In some cases, the device 1205 may include a single antenna 1225.However, in some other cases, the device 1205 may have more than oneantenna 1225, which may be capable of concurrently transmitting orreceiving multiple wireless transmissions. The transceiver 1215 maycommunicate bi-directionally, via the one or more antennas 1225, wired,or wireless links as described herein. For example, the transceiver 1215may represent a wireless transceiver and may communicatebi-directionally with another wireless transceiver. The transceiver 1215may also include a modem to modulate the packets, to provide themodulated packets to one or more antennas 1225 for transmission, and todemodulate packets received from the one or more antennas 1225. Thetransceiver 1215, or the transceiver 1215 and one or more antennas 1225,may be an example of a transmitter 915, a transmitter 1015, a receiver910, a receiver 1010, or any combination thereof or component thereof,as described herein.

The memory 1230 may include random access memory (RAM) and read-onlymemory (ROM). The memory 1230 may store computer-readable,computer-executable code 1235 including instructions that, when executedby the processor 1240, cause the device 1205 to perform variousfunctions described herein. The code 1235 may be stored in anon-transitory computer-readable medium such as system memory or anothertype of memory. In some cases, the code 1235 may not be directlyexecutable by the processor 1240 but may cause a computer (e.g., whencompiled and executed) to perform functions described herein. In somecases, the memory 1230 may contain, among other things, a basic I/Osystem (BIOS) which may control basic hardware or software operationsuch as the interaction with peripheral components or devices.

The processor 1240 may include an intelligent hardware device (e.g., ageneral-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, anFPGA, a programmable logic device, a discrete gate or transistor logiccomponent, a discrete hardware component, or any combination thereof).In some cases, the processor 1240 may be configured to operate a memoryarray using a memory controller. In some other cases, a memorycontroller may be integrated into the processor 1240. The processor 1240may be configured to execute computer-readable instructions stored in amemory (e.g., the memory 1230) to cause the device 1205 to performvarious functions (e.g., functions or tasks supporting techniques formanaging a radio transceiver chain for multiple RATs). For example, thedevice 1205 or a component of the device 1205 may include a processor1240 and memory 1230 coupled to the processor 1240, the processor 1240and memory 1230 configured to perform various functions describedherein.

The communications manager 1220 may support wireless communication atthe device 1205 in accordance with examples as disclosed herein. Forexample, the communications manager 1220 may be configured as orotherwise support a means for monitoring a channel for wirelesscommunication associated with a first RAT during one or more of a firstactive duration or a first inactive duration, the device 1205 operatingin a first power mode during the first inactive duration. Thecommunications manager 1220 may be configured as or otherwise support ameans for monitoring the channel for wireless communication associatedwith a second RAT during one or more of a second active duration or asecond inactive duration, the device 1205 operating during the secondinactive duration in one or more of the first power mode based on anabsence of an overlap between the first active duration and one or moreof the second active duration or a third active duration, or a secondpower mode based on the overlap between the first active duration andone or more of the second active duration or the third active duration.The communications manager 1220 may be configured as or otherwisesupport a means for operating the device 1205 according to the firstpower mode or the second power mode based on the monitoring of thechannel associated with the first RAT and the second RAT. By includingor configuring the communications manager 1220 in accordance withexamples as described herein, the device 1205 may support techniques formore efficient utilization of communication resources and longer batterylife.

In some examples, the communications manager 1220 may be configured toperform various operations (e.g., receiving, monitoring, transmitting)using or otherwise in cooperation with the transceiver 1215, the one ormore antennas 1225, or any combination thereof. Although thecommunications manager 1220 is illustrated as a separate component, insome examples, one or more functions described with reference to thecommunications manager 1220 may be supported by or performed by theprocessor 1240, the memory 1230, the code 1235, or any combinationthereof. For example, the code 1235 may include instructions executableby the processor 1240 to cause the device 1205 to perform variousaspects of techniques for managing a radio transceiver chain formultiple RATs as described herein, or the processor 1240 and the memory1230 may be otherwise configured to perform or support such operations.

FIG. 13 shows a flowchart illustrating a method 1300 that supportstechniques for managing a radio transceiver chain for multiple RATs inaccordance with various aspects of the present disclosure. Theoperations of the method 1300 may be implemented by a UE or itscomponents as described herein. For example, the operations of themethod 1300 may be performed by a UE 115 as described with reference toFIGS. 1 through 12 . In some examples, a UE may execute a set ofinstructions to control the functional elements of the UE to perform thedescribed functions. Additionally or alternatively, the UE may performaspects of the described functions using special-purpose hardware.

At 1305, the method may include monitoring a channel for wirelesscommunication associated with a first RAT during one or more of a firstactive duration or a first inactive duration, the device operating in afirst power mode during the first inactive duration. The operations of1305 may be performed in accordance with examples as disclosed herein.In some examples, aspects of the operations of 1305 may be performed bya channel component 1125 as described with reference to FIG. 11 .

At 1310, the method may include monitoring the channel for wirelesscommunication associated with a second RAT during one or more of asecond active duration or a second inactive duration, the deviceoperating during the second inactive duration in one or more of thefirst power mode based on an absence of an overlap between the firstactive duration and one or more of the second active duration or a thirdactive duration, or a second power mode based on the overlap between thefirst active duration and one or more of the second active duration orthe third active duration. The operations of 1310 may be performed inaccordance with examples as disclosed herein. In some examples, aspectsof the operations of 1310 may be performed by a channel component 1125as described with reference to FIG. 11 .

At 1315, the method may include operating the device according to thefirst power mode or the second power mode based on the monitoring of thechannel associated with the first RAT and the second RAT. The operationsof 1315 may be performed in accordance with examples as disclosedherein. In some examples, aspects of the operations of 1315 may beperformed by a mode component 1130 as described with reference to FIG.11 .

FIG. 14 shows a flowchart illustrating a method 1400 that supportstechniques for managing a radio transceiver chain for multiple RATs inaccordance with various aspects of the present disclosure. Theoperations of the method 1400 may be implemented by a UE or itscomponents as described herein. For example, the operations of themethod 1400 may be performed by a UE 115 as described with reference toFIGS. 1 through 12 . In some examples, a UE may execute a set ofinstructions to control the functional elements of the UE to perform thedescribed functions. Additionally or alternatively, the UE may performaspects of the described functions using special-purpose hardware.

At 1405, the method may include receiving control signaling indicating aconfiguration for the device, the configuration indicating one or moreof a first active duration, a first inactive duration, a second activeduration, a second inactive duration, or a third active duration. Theoperations of 1405 may be performed in accordance with examples asdisclosed herein. In some examples, aspects of the operations of 1405may be performed by a configuration component 1160 as described withreference to FIG. 11 .

At 1410, the method may include monitoring a channel for wirelesscommunication associated with a first RAT during one or more of thefirst active duration or the first inactive duration, the deviceoperating in a first power mode during the first inactive duration. Theoperations of 1410 may be performed in accordance with examples asdisclosed herein. In some examples, aspects of the operations of 1410may be performed by a channel component 1125 as described with referenceto FIG. 11 .

At 1415, the method may include monitoring the channel for wirelesscommunication associated with a second RAT during one or more of thesecond active duration or the second inactive duration, the deviceoperating during the second inactive duration in one or more of thefirst power mode based on an absence of an overlap between the firstactive duration and one or more of the second active duration or thethird active duration, or a second power mode based on the overlapbetween the first active duration and one or more of the second activeduration or the third active duration. The operations of 1415 may beperformed in accordance with examples as disclosed herein. In someexamples, aspects of the operations of 1415 may be performed by achannel component 1125 as described with reference to FIG. 11 .

At 1420, the method may include operating the device according to thefirst power mode or the second power mode based on the monitoring of thechannel associated with the first RAT and the second RAT. The operationsof 1420 may be performed in accordance with examples as disclosedherein. In some examples, aspects of the operations of 1420 may beperformed by a mode component 1130 as described with reference to FIG.11 .

FIG. 15 shows a flowchart illustrating a method 1500 that supportstechniques for managing a radio transceiver chain for multiple RATs inaccordance with various aspects of the present disclosure. Theoperations of the method 1500 may be implemented by a UE or itscomponents as described herein. For example, the operations of themethod 1500 may be performed by a UE 115 as described with reference toFIGS. 1 through 12 . In some examples, a UE may execute a set ofinstructions to control the functional elements of the UE to perform thedescribed functions. Additionally or alternatively, the UE may performaspects of the described functions using special-purpose hardware.

At 1505, the method may include allocating, based on a configuration, afirst set of antennas associated with the device to monitor a channelfor wireless communication associated with a first RAT during one ormore of a first active duration or a first inactive duration. Theoperations of 1505 may be performed in accordance with examples asdisclosed herein. In some examples, aspects of the operations of 1550may be performed by an RF chain component 1140 as described withreference to FIG. 11 .

At 1510, the method may include allocating, based on the configuration,a second set of antennas associated with the device to monitor thechannel for the wireless communication associated with a second RATduring one or more of a second active duration or a second inactiveduration. The operations of 1510 may be performed in accordance withexamples as disclosed herein. In some examples, aspects of theoperations of 1510 may be performed by an RF chain component 1140 asdescribed with reference to FIG. 11 .

FIG. 16 shows a flowchart illustrating a method 1600 that supportstechniques for managing a radio transceiver chain for multiple RATs inaccordance with various aspects of the present disclosure. Theoperations of the method 1600 may be implemented by a UE or itscomponents as described herein. For example, the operations of themethod 1600 may be performed by a UE 115 as described with reference toFIGS. 1 through 12 . In some examples, a UE may execute a set ofinstructions to control the functional elements of the UE to perform thedescribed functions. Additionally or alternatively, the UE may performaspects of the described functions using special-purpose hardware.

At 1605, the method may include monitoring a channel for wirelesscommunication associated with a first RAT during one or more of a firstactive duration or a first inactive duration, the device operating in afirst power mode during the first inactive duration. The operations of1605 may be performed in accordance with examples as disclosed herein.In some examples, aspects of the operations of 1605 may be performed bya channel component 1125 as described with reference to FIG. 11 .

At 1610, the method may include monitoring the channel for wirelesscommunication associated with a second RAT during one or more of asecond active duration or a second inactive duration, the deviceoperating during the second inactive duration in one or more of thefirst power mode based on an absence of an overlap between the firstactive duration and one or more of the second active duration or a thirdactive duration, or a second power mode based on the overlap between thefirst active duration and one or more of the second active duration orthe third active duration. The operations of 1610 may be performed inaccordance with examples as disclosed herein. In some examples, aspectsof the operations of 1610 may be performed by a channel component 1125as described with reference to FIG. 11 .

At 1615, the method may include operating the device according to thefirst power mode or the second power mode based on the monitoring of thechannel associated with the first RAT and the second RAT. The operationsof 1615 may be performed in accordance with examples as disclosedherein. In some examples, aspects of the operations of 1615 may beperformed by a mode component 1130 as described with reference to FIG.11 .

At 1620, the method may include managing one or more memory registersassociated with the device for one or more of the first RAT and thesecond RAT, the one or more memory registers corresponding to a radiotransceiver chain associated with the device, the one or more memoryregisters are shared between the first RAT and the second RAT. Theoperations of 1620 may be performed in accordance with examples asdisclosed herein. In some examples, aspects of the operations of 1620may be performed by a register component 1145 as described withreference to FIG. 11 .

The following provides an overview of aspects of the present disclosure:

Aspect 1: A method for wireless communication at a device, comprising:monitoring a channel for wireless communication associated with a firstRAT during one or more of a first active duration or a first inactiveduration, the device operating in a first power mode during the firstinactive duration; monitoring the channel for wireless communicationassociated with a second RAT during one or more of a second activeduration or a second inactive duration, the device operating during thesecond inactive duration in one or more of the first power mode based atleast in part on an absence of an overlap between the first activeduration and one or more of the second active duration or a third activeduration, or a second power mode based at least in part on the overlapbetween the first active duration and one or more of the second activeduration or the third active duration; and operating the deviceaccording to the first power mode or the second power mode based atleast in part on the monitoring of the channel associated with the firstRAT and the second RAT.

Aspect 2: The method of aspect 1, wherein the device includes a radiotransceiver chain for one or more of receiving or transmitting thewireless communication associated with one or more of the first RAT orthe second RAT.

Aspect 3: The method of aspect 2, further comprising: operating theradio transceiver chain associated with the device in the first powermode during the first inactive duration based at least in part on themonitoring of the channel for the wireless communication associated withthe first RAT during one or more of the first active duration or thefirst inactive duration.

Aspect 4: The method of aspect 3, wherein monitoring the channel for thewireless communication associated with the first RAT comprises: enablingthe radio transceiver chain to monitor the channel for the wirelesscommunication associated with the first RAT during the first activeduration based at least in part on a timer; activating the timer basedat least in part on the enabling of the radio transceiver chain tomonitor the channel for the wireless communication associated with thefirst RAT during the first active duration; and disabling the radiotransceiver chain from monitoring the channel for the wirelesscommunication associated with the first RAT by switching the radiotransceiver chain to operate in the first power mode during the firstinactive duration based at least in part on the timer expiring.

Aspect 5: The method of any of aspects 3 through 4, further comprising:operating the radio transceiver chain associated with the device in oneor more of the first power mode or the second power mode during thesecond inactive duration based at least in part on the monitoring of thechannel for the wireless communication associated with the second RATduring one or more of the second active duration or the second inactiveduration.

Aspect 6: The method of aspect 5, wherein monitoring the channel for thewireless communication associated with the second RAT comprises:enabling the radio transceiver chain to monitor the channel for thewireless communication associated with the second RAT during the secondactive duration based at least in part on a timer; activating the timerbased at least in part on the enabling of the radio transceiver chain tomonitor the channel for the wireless communication associated with thesecond RAT during the second active duration; and disabling the radiotransceiver chain from monitoring the channel for the wirelesscommunication associated with the second RAT by switching the radiotransceiver chain to operate in the first power mode or the second powermode during the second inactive duration based at least in part on thetimer expiring.

Aspect 7: The method of aspect 6, further comprising: switching theradio transceiver chain to operate in the first power mode during thesecond inactive duration based at least in part on the first inactiveduration nonoverlapping with one or more of an ending portion of thesecond active duration or a beginning portion of the third activeduration following the second active duration.

Aspect 8: The method of any of aspects 6 through 7, further comprising:switching the radio transceiver chain to operate in the second powermode during the second inactive duration based at least in part on thefirst inactive duration overlapping with one or more of an endingportion of the second active duration or a beginning portion of thethird active duration following the second active duration.

Aspect 9: The method of any of aspects 2 through 8, further comprising:receiving control signaling indicating a configuration for the device,the configuration indicating one or more of the first active duration,the first inactive duration, the second active duration, the secondinactive duration, or the third active duration, wherein operating theradio transceiver chain in one or more of the first power mode or thesecond power mode is based at least in part on the configuration.

Aspect 10: The method of any of aspects 1 through 9, further comprising:adjusting the second active duration based at least in part on a portionof the first active duration overlapping with a portion of the secondactive duration.

Aspect 11: The method of aspect 10, further comprising: determining oneor more of a beginning of the first active duration or a beginning ofthe second active duration based at least in part on schedulinginformation; and adjusting the beginning of the second active durationto occur before the beginning of the first active duration based atleast in part on determining that the portion of the first activeduration overlaps with the portion of the second active duration.

Aspect 12: The method of any of aspects 10 through 11, furthercomprising: determining one or more of an ending of the first activeduration or an ending of the second active duration based at least inpart on scheduling information; and adjusting the ending of the secondactive duration to occur after the ending of the first active durationbased at least in part on determining that the portion of the firstactive duration overlaps with the portion of the second active duration.

Aspect 13: The method of any of aspects 1 through 12, furthercomprising: allocating, based at least in part on a configuration, afirst set of antennas associated with the device to monitor the channelfor the wireless communication associated with the first RAT during oneor more of the first active duration or the first inactive duration; andallocating, based at least in part on the configuration, a second set ofantennas associated with the device to monitor the channel for thewireless communication associated with the second RAT during one or moreof the second active duration or the second inactive duration.

Aspect 14: The method of aspect 13, wherein the first set of antennasare nonoverlapping with the second set of antennas.

Aspect 15: The method of any of aspects 13 through 14, furthercomprising: reallocating one or more of the first set of antennas or thesecond set of antennas based at least in part on one or more of thefirst active duration or the second active duration.

Aspect 16: The method of any of aspects 1 through 15, furthercomprising: managing one or more memory registers associated with thedevice for one or more of the first RAT and the second RAT, the one ormore memory registers corresponding to a radio transceiver chainassociated with the device, the one or more memory registers are sharedbetween the first RAT and the second RAT.

Aspect 17: The method of aspect 16, wherein managing the one or morememory registers comprises: refraining a first SIM associated with thedevice and a second SIM associated with the device from jointlyadjusting a state of the one or more memory registers, the first SIMcorresponding to the first RAT and the second SIM corresponding to thesecond RAT.

Aspect 18: The method of any of aspects 1 through 17, furthercomprising: refraining a first SIM associated with the device and asecond SIM associated with the device from jointly adjusting anoperating mode of a radio transceiver chain associated with the device.

Aspect 19: The method of any of aspects 1 through 18, furthercomprising: adjusting an operating mode of a radio transceiver chainassociated with the device based at least in part on an acknowledgementbetween a first SIM associated with the device and a second SIMassociated with the device, the first SIM corresponding to the first RATand the second SIM corresponding to the second RAT.

Aspect 20: The method of any of aspects 1 through 19, furthercomprising: disabling a baseband circuit and an RF front-end circuitassociated with the device while the device is operating in the firstpower mode.

Aspect 21: The method of any of aspects 1 through 20, furthercomprising: disabling a baseband circuit associated with the devicebased at least in part on the device operating in the second power mode;and enabling an RF front-end circuit associated with the device based atleast in part on the device operating in the second power mode.

Aspect 22: The method of any of aspects 1 through 21, wherein the firstactive duration includes a 4G wakeup duration and the second activeduration includes a 5G discontinuous reception duration.

Aspect 23: The method of any of aspects 1 through 22, wherein the firstRAT corresponds to a first SIM associated with the device and the secondRAT corresponds to a second SIM associated with the device.

Aspect 24: The method of any of aspects 1 through 23, wherein the deviceincludes a multiple-input multiple-output radio transceiver chainenabled to perform spatial multiplexing.

Aspect 25: The method of any of aspects 1 through 24, wherein one ormore the first RAT or the second RAT includes a 4G RAT or a 5G RAT.

Aspect 26: An apparatus for wireless communication at a device,comprising a processor; memory coupled with the processor; andinstructions stored in the memory and executable by the processor tocause the apparatus to perform a method of any of aspects 1 through 25.

Aspect 27: An apparatus for wireless communication at a device,comprising at least one means for performing a method of any of aspects1 through 25.

Aspect 28: A non-transitory computer-readable medium storing code forwireless communication at a device, the code comprising instructionsexecutable by a processor to perform a method of any of aspects 1through 25.

It should be noted that the methods described herein describe possibleimplementations, and that the operations and the steps may be rearrangedor otherwise modified and that other implementations are possible.Further, aspects from two or more of the methods may be combined.

Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may bedescribed for purposes of example, and LTE, LTE-A, LTE-A Pro, or NRterminology may be used in much of the description, the techniquesdescribed herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NRnetworks. For example, the described techniques may be applicable tovarious other wireless communications systems such as Ultra MobileBroadband (UMB), Institute of Electrical and Electronics Engineers(IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, aswell as other systems and radio technologies not explicitly mentionedherein.

Information and signals described herein may be represented using any ofa variety of different technologies and techniques. For example, data,instructions, commands, information, signals, bits, symbols, and chipsthat may be referenced throughout the description may be represented byvoltages, currents, electromagnetic waves, magnetic fields or particles,optical fields or particles, or any combination thereof.

The various illustrative blocks and components described in connectionwith the disclosure herein may be implemented or performed with ageneral-purpose processor, a DSP, an ASIC, a CPU, an FPGA or otherprogrammable logic device, discrete gate or transistor logic, discretehardware components, or any combination thereof designed to perform thefunctions described herein. A general-purpose processor may be amicroprocessor, but in the alternative, the processor may be anyprocessor, controller, microcontroller, or state machine. A processormay also be implemented as a combination of computing devices (e.g., acombination of a DSP and a microprocessor, multiple microprocessors, oneor more microprocessors in conjunction with a DSP core, or any othersuch configuration).

The functions described herein may be implemented in hardware, softwareexecuted by a processor, firmware, or any combination thereof. Ifimplemented in software executed by a processor, the functions may bestored on or transmitted over as one or more instructions or code on acomputer-readable medium. Other examples and implementations are withinthe scope of the disclosure and appended claims. For example, due to thenature of software, functions described herein may be implemented usingsoftware executed by a processor, hardware, firmware, hardwiring, orcombinations of any of these. Features implementing functions may alsobe physically located at various positions, including being distributedsuch that portions of functions are implemented at different physicallocations.

Computer-readable media includes both non-transitory computer storagemedia and communication media including any medium that facilitatestransfer of a computer program from one place to another. Anon-transitory storage medium may be any available medium that may beaccessed by a general-purpose or special-purpose computer. By way ofexample, and not limitation, non-transitory computer-readable media mayinclude RAM, ROM, electrically erasable programmable ROM (EEPROM), flashmemory, compact disk (CD) ROM or other optical disk storage, magneticdisk storage or other magnetic storage devices, or any othernon-transitory medium that may be used to carry or store desired programcode means in the form of instructions or data structures and that maybe accessed by a general-purpose or special-purpose computer, or ageneral-purpose or special-purpose processor. Also, any connection isproperly termed a computer-readable medium. For example, if the softwareis transmitted from a website, server, or other remote source using acoaxial cable, fiber optic cable, twisted pair, digital subscriber line(DSL), or wireless technologies such as infrared, radio, and microwave,then the coaxial cable, fiber optic cable, twisted pair, DSL, orwireless technologies such as infrared, radio, and microwave areincluded in the definition of computer-readable medium. Disk and disc,as used herein, include CD, laser disc, optical disc, digital versatiledisc (DVD), floppy disk and Blu-ray disc where disks usually reproducedata magnetically, while discs reproduce data optically with lasers.Combinations of the above are also included within the scope ofcomputer-readable media.

As used herein, including in the claims, “or” as used in a list of items(e.g., a list of items prefaced by a phrase such as “at least one of” or“one or more of”) indicates an inclusive list such that, for example, alist of at least one of A, B, or C means A or B or C or AB or AC or BCor ABC (i.e., A and B and C). Also, as used herein, the phrase “basedon” shall not be construed as a reference to a closed set of conditions.For example, an example step that is described as “based on condition A”may be based on both a condition A and a condition B without departingfrom the scope of the present disclosure. In other words, as usedherein, the phrase “based on” shall be construed in the same manner asthe phrase “based at least in part on.”

The term “determine” or “determining” encompasses a wide variety ofactions and, therefore, “determining” can include calculating,computing, processing, deriving, investigating, looking up (such as vialooking up in a table, a database or another data structure),ascertaining and the like. Also, “determining” can include receiving(such as receiving information), accessing (such as accessing data in amemory) and the like. Also, “determining” can include resolving,selecting, choosing, establishing and other such similar actions.

In the appended figures, similar components or features may have thesame reference label. Further, various components of the same type maybe distinguished by following the reference label by a dash and a secondlabel that distinguishes among the similar components. If just the firstreference label is used in the specification, the description isapplicable to any one of the similar components having the same firstreference label irrespective of the second reference label, or othersubsequent reference label.

The description set forth herein, in connection with the appendeddrawings, describes example configurations and does not represent allthe examples that may be implemented or that are within the scope of theclaims. The term “example” used herein means “serving as an example,instance, or illustration,” and not “preferred” or “advantageous overother examples.” The detailed description includes specific details forthe purpose of providing an understanding of the described techniques.These techniques, however, may be practiced without these specificdetails. In some instances, known structures and devices are shown inblock diagram form in order to avoid obscuring the concepts of thedescribed examples.

The description herein is provided to enable a person having ordinaryskill in the art to make or use the disclosure. Various modifications tothe disclosure will be apparent to a person having ordinary skill in theart, and the generic principles defined herein may be applied to othervariations without departing from the scope of the disclosure. Thus, thedisclosure is not limited to the examples and designs described hereinbut is to be accorded the broadest scope consistent with the principlesand novel features disclosed herein.

What is claimed is:
 1. A method for wireless communication at a device,comprising: receiving first wireless communications associated with afirst radio access technology during one or more of a first activeduration associated with a first power mode or a first inactive durationassociated with a second power mode that consumes less power than thefirst power mode; and receiving second wireless communicationsassociated with a second radio access technology during one or more of asecond active duration associated with the first power mode or a secondinactive duration associated with the second power mode, the deviceoperating in a third power mode different from the second power modeduring at least a portion of the second inactive duration when the firstactive duration associated with the first radio access technologyoverlaps with the second active duration associated with the secondradio access technology, wherein the device switches from the firstpower mode to the third power mode without reconfiguring one or moreradio frequency front-end switches shared between the first radio accesstechnology and the second radio access technology.
 2. The method ofclaim 1, wherein the device includes a radio transceiver chain for oneor more of receiving or transmitting wireless communications associatedwith one or more of the first radio access technology or the secondradio access technology.
 3. The method of claim 2, further comprising:operating the radio transceiver chain associated with the device in thefirst power mode during the first inactive duration based at least inpart on monitoring for the first wireless communications associated withthe first radio access technology during one or more of the first activeduration or the first inactive duration.
 4. The method of claim 3,wherein receiving the first wireless communications associated with thefirst radio access technology comprises: enabling the radio transceiverchain to monitor for the first wireless communications associated withthe first radio access technology during the first active duration basedat least in part on a timer; activating the timer based at least in parton enabling the radio transceiver chain to monitor for the secondwireless communications associated with the first radio accesstechnology during the first active duration; and disabling the radiotransceiver chain from monitoring for the first wireless communicationsassociated with the first radio access technology by switching the radiotransceiver chain to operate in the first power mode during the firstinactive duration based at least in part on the timer expiring.
 5. Themethod of claim 3, further comprising: operating the radio transceiverchain associated with the device in one or more of the first power modeor the second power mode during the second inactive duration based atleast in part on monitoring of for the second wireless communicationsassociated with the second radio access technology during one or more ofthe second active duration or the second inactive duration.
 6. Themethod of claim 5, wherein receiving the second wireless communicationsassociated with the second radio access technology comprises: enablingthe radio transceiver chain to monitor for the second wirelesscommunications associated with the second radio access technology duringthe second active duration based at least in part on a timer; activatingthe timer based at least in part on enabling the radio transceiver chainto monitor for the second wireless communications associated with thesecond radio access technology during the second active duration; anddisabling the radio transceiver chain from monitoring for the secondwireless communications associated with the second radio accesstechnology by switching the radio transceiver chain to operate in thefirst power mode or the second power mode during the second inactiveduration based at least in part on the timer expiring.
 7. The method ofclaim 6, further comprising: switching the radio transceiver chain tooperate in the first power mode during the second inactive durationbased at least in part on an absence of an overlap between the firstinactive duration and one or more of an ending portion of the secondactive duration or a beginning portion of a third active durationfollowing the second active duration.
 8. The method of claim 6, furthercomprising: switching the radio transceiver chain to operate in thesecond power mode during the second inactive duration based at least inpart on the first inactive duration overlapping with one or more of anending portion of the second active duration or a beginning portion of athird active duration following the second active duration.
 9. Themethod of claim 2, further comprising: receiving control signalingindicating a configuration for the device, the configuration indicatingone or more of the first active duration, the first inactive duration,the second active duration, the second inactive duration, or a thirdactive duration following the second active duration, wherein operatingthe radio transceiver chain in one or more of the first power mode orthe second power mode is based at least in part on the configuration.10. The method of claim 1, further comprising: adjusting the secondactive duration based at least in part on a portion of the first activeduration overlapping with a portion of the second active duration. 11.The method of claim 10, further comprising: determining one or more of abeginning of the first active duration or a beginning of the secondactive duration based at least in part on scheduling information; andadjusting the beginning of the second active duration to occur beforethe beginning of the first active duration based at least in part ondetermining that the portion of the first active duration overlaps withthe portion of the second active duration.
 12. The method of claim 10,further comprising: determining one or more of an ending of the firstactive duration or an ending of the second active duration based atleast in part on scheduling information; and adjusting the ending of thesecond active duration to occur after the ending of the first activeduration based at least in part on determining that the portion of thefirst active duration overlaps with the portion of the second activeduration.
 13. The method of claim 1, further comprising: allocating,based at least in part on a configuration, a first set of antennasassociated with the device to monitor for the first wirelesscommunications associated with the first radio access technology duringone or more of the first active duration or the first inactive duration;and allocating, based at least in part on the configuration, a secondset of antennas associated with the device to monitor for the secondwireless communications associated with the second radio accesstechnology during one or more of the second active duration or thesecond inactive duration.
 14. The method of claim 13, wherein the firstset of antennas are nonoverlapping with the second set of antennas. 15.The method of claim 13, further comprising: reallocating one or more ofthe first set of antennas or the second set of antennas based at leastin part on one or more of the first active duration or the second activeduration.
 16. The method of claim 1, further comprising: managing one ormore memory registers associated with the device for one or more of thefirst radio access technology and the second radio access technology,the one or more memory registers corresponding to a radio transceiverchain associated with the device, the one or more memory registers areshared between the first radio access technology and the second radioaccess technology.
 17. The method of claim 16, wherein managing the oneor more memory registers comprises: refraining a first subscriberidentity module associated with the device and a second subscriberidentity module associated with the device from jointly adjusting aconfiguration of the one or more memory registers, the first subscriberidentity module corresponding to the first radio access technology andthe second subscriber identity module corresponding to the second radioaccess technology.
 18. The method of claim 1, further comprising:refraining a first subscriber identity module associated with the deviceand a second subscriber identity module associated with the device fromjointly adjusting an operating mode of a radio transceiver chainassociated with the device.
 19. The method of claim 1, furthercomprising: adjusting an operating mode of a radio transceiver chainassociated with the device based at least in part on an acknowledgementbetween a first subscriber identity module associated with the deviceand a second subscriber identity module associated with the device, thefirst subscriber identity module corresponding to the first radio accesstechnology and the second subscriber identity module corresponding tothe second radio access technology.
 20. The method of claim 1, furthercomprising: disabling a baseband circuit and a radio frequency front-endcircuit associated with the device while the device is operating in thefirst power mode.
 21. The method of claim 1, further comprising:disabling a baseband circuit associated with the device based at leastin part on the device operating in the second power mode; and enabling aradio frequency front-end circuit associated with the device based atleast in part on the device operating in the second power mode.
 22. Themethod of claim 1, wherein the first active duration includes a fourthgeneration wakeup duration and the second active duration includes afifth generation discontinuous reception duration.
 23. The method ofclaim 1, wherein the first radio access technology corresponds to afirst subscriber identity module associated with the device and thesecond radio access technology corresponds to a second subscriberidentity module associated with the device.
 24. The method of claim 1,wherein the device includes a multiple-input multiple-output radiotransceiver chain enabled to perform spatial multiplexing.
 25. Themethod of claim 1, wherein one or more the first radio access technologyor the second radio access technology includes a fourth generation radioaccess technology or a fifth generation radio access technology.
 26. Anapparatus for wireless communication at a device, comprising: aprocessor; memory coupled with the processor; and instructions stored inthe memory and executable by the processor to cause the apparatus to:receive first wireless communications associated with a first radioaccess technology during one or more of a first active durationassociated with a first power mode or a first inactive durationassociated with a second power mode that consumes less power than thefirst power mode; and receive second wireless communications associatedwith a second radio access technology during one or more of a secondactive duration associated with the first power mode or a secondinactive duration associated with the second power mode, the deviceoperating in a third power mode different from the second power modeduring at least a portion of the second inactive duration when the firstactive duration associated with the first radio access technologyoverlaps with the second active duration associated with the secondradio access technology, wherein the device switches from the firstpower mode to the third power mode without reconfiguring one or moreradio frequency front-end switches shared between the first radio accesstechnology and the second radio access technology.
 27. The apparatus ofclaim 26, wherein the device includes a radio transceiver chain for oneor more of receiving or transmitting wireless communications associatedwith one or more of the first radio access technology or the secondradio access technology.
 28. The apparatus of claim 27, wherein theinstructions are further executable by the processor to cause theapparatus to: operate the radio transceiver chain associated with thedevice in the first power mode during the first inactive duration basedat least in part on monitoring for the first wireless communicationsassociated with the first radio access technology during one or more ofthe first active duration or the first inactive duration.
 29. Anapparatus for wireless communication at a device, comprising: means forreceiving first wireless communications associated with a first radioaccess technology during one or more of a first active durationassociated with a first power mode or a first inactive durationassociated with a second power mode that consumes less power than thefirst power mode; and means for receiving second wireless communicationsassociated with a second radio access technology during one or more of asecond active duration associated with the first power mode or a secondinactive duration associated with the second power mode, the deviceoperating in a third power mode different from the second power modeduring at least a portion of the second inactive duration when the firstactive duration associated with the first radio access technologyoverlaps with the second active duration associated with the secondradio access technology, wherein the device switches from the firstpower mode to the third power mode without reconfiguring one or moreradio frequency front-end switches shared between the first radio accesstechnology and the second radio access technology.
 30. A non-transitorycomputer-readable medium storing code for wireless communication at adevice, the code comprising instructions executable by a processor to:receive first wireless communications associated with a first radioaccess technology during one or more of a first active durationassociated with a first power mode or a first inactive durationassociated with a second power mode that consumes less power than thefirst power mode; and receive second wireless communications associatedwith a second radio access technology during one or more of a secondactive duration associated with the first power mode or a secondinactive duration associated with the second power mode, the deviceoperating in a third power mode different from the second power modeduring at least a portion of the second inactive duration when the firstactive duration associated with the first radio access technologyoverlaps with the second active duration associated with the secondradio access technology, wherein the device switches from the firstpower mode to the third power mode without reconfiguring one or moreradio frequency front-end switches shared between the first radio accesstechnology and the second radio access technology.